Removed "Manage back button" setting

res/values-ca/strings.xml

@@ -881,9 +881,6 @@ http://k9mail.googlecode.com/
     <string name="volume_navigation_message">Vista del missatge</string>
     <string name="volume_navigation_list">Vista de diverses de llistes</string>
 
-    <string name="manage_back_title">Gestiona botó d’\"Enrere\"</string>
-    <string name="manage_back_summary">Fes que \"Enrere\" faci anar un nivell amunt</string>
-
     <string name="start_integrated_inbox_title">Comença bústia unificada</string>
     <string name="start_integrated_inbox_summary">Mostra la bústia unificada després de començar</string>
 

res/values-cs/strings.xml

@@ -886,9 +886,6 @@ http://k9mail.googlecode.com/
     <string name="volume_navigation_message">Zobrazení zpráv</string>
     <string name="volume_navigation_list">Různá zobrazení seznamů</string>
 
-    <string name="manage_back_title">Ovládání tlačítka \"Zpět\"</string>
-    <string name="manage_back_summary">Tlačítkem \"Zpět\" jít vždy o úroveň výše</string>
-
     <string name="start_integrated_inbox_title">Začít v Integrovaná doručené poště</string>
     <string name="start_integrated_inbox_summary">Po startu zobrazit Integrovanou doručenou poštu</string>
 

res/values-da/strings.xml

@@ -881,9 +881,6 @@ http://k9mail.googlecode.com/
     <string name="volume_navigation_message">Mail-visning</string>
     <string name="volume_navigation_list">Diverse listevisninger</string>
 
-    <string name="manage_back_title">Håndter \"Tilbageknap\"</string>
-    <string name="manage_back_summary">\"Tilbageknap\" går altid et niveau op</string>
-
     <string name="start_integrated_inbox_title">Start i fælles indbakke</string>
     <string name="start_integrated_inbox_summary">Vis indhold af fælles indbakke ved opstart</string>
 

res/values-de/strings.xml

@@ -880,9 +880,6 @@ http://k9mail.googlecode.com/.
     <string name="volume_navigation_message">Nachrichtenansicht</string>
     <string name="volume_navigation_list">Diverse Listenansichten</string>
 
-    <string name="manage_back_title">\"Zurück\"-Taste</string>
-    <string name="manage_back_summary">Die \"Zurück\"-Taste bringt Sie eine Ebene nach oben</string>
-
     <string name="start_integrated_inbox_title">Gemeinsamer Posteingang bei Start</string>
     <string name="start_integrated_inbox_summary">Zeige gemeinsamen Posteingang beim Programmstart</string>
 

res/values-el/strings.xml

@@ -878,9 +878,6 @@ http://k9mail.googlecode.com/
     <string name="volume_navigation_message">Προβολή μηνύματος</string>
     <string name="volume_navigation_list">Διάφορες προβολές λίστας</string>
 
-    <string name="manage_back_title">Λειτουργία πλήκτρου \'Πίσω\'</string>
-    <string name="manage_back_summary">Το πλήκτρο \'Πίσω\' να ανεβαίνει ένα επίπεδο πάνω</string>
-
     <string name="start_integrated_inbox_title">Εκκίνηση στα ενιαία εισερχόμενα</string>
     <string name="start_integrated_inbox_summary">Προβολή των \'Ενιαίων Εισερχόμενων\' κατά την εκκίνηση</string>
 

res/values-es/strings.xml

@@ -878,9 +878,6 @@ http://k9mail.googlecode.com/
     <string name="volume_navigation_message">Vista de mensaje</string>
     <string name="volume_navigation_list">Listas de mensajes</string>
 
-    <string name="manage_back_title">Controlar botón \"Atras\" </string>
-    <string name="manage_back_summary">Ir \"Atras\" hacia un nivel superior</string>
-
     <string name="start_integrated_inbox_title">Usar Bandeja Unificada</string>
     <string name="start_integrated_inbox_summary">Mostrar una Bandeja de Entrada unificada al inicio</string>
 

res/values-fi/strings.xml

@@ -884,9 +884,6 @@ http://k9mail.googlecode.com/
     <string name="volume_navigation_message">Viestinäkymä</string>
     <string name="volume_navigation_list">Erilaisia listanäkymiä</string>
 
-    <string name="manage_back_title">Määritä Takaisin-painike</string>
-    <string name="manage_back_summary">Pakota Takaisin-painike siirtämään aina ylemmälle tasolle</string>
-
     <string name="start_integrated_inbox_title">Aloita yhdistetystä Saapuneet-kansiosta</string>
     <string name="start_integrated_inbox_summary">Näytä Yhdistetty Saapuneet-kansio ohjelman käynnistyksen jälkeen</string>
 

res/values-fr/strings.xml

@@ -904,9 +904,6 @@ de plus</string>
     <string name="volume_navigation_message">Visualisation d\'un message</string>
     <string name="volume_navigation_list">Différents écrans à liste</string>
 
-    <string name="manage_back_title">Gérer la touche «\u00A0Retour\u00A0»</string>
-    <string name="manage_back_summary">La touche «\u00A0Retour\u00A0» remonte toujours un niveau</string>
-
     <string name="start_integrated_inbox_title">Boîte de messagerie unifiée au démarrage</string>
     <string name="start_integrated_inbox_summary">Afficher la boîte de messagerie unifiée au démarrage</string>
 

res/values-gl/strings.xml

@@ -878,9 +878,6 @@ http://k9mail.googlecode.com/
     <string name="volume_navigation_message">Vista de mensaxe</string>
     <string name="volume_navigation_list">Listas de mensaxes</string>
 
-    <string name="manage_back_title">Controlar botón \"Atras\" </string>
-    <string name="manage_back_summary">Facer \"Atras\" sempre un nivel superior</string>
-
     <string name="start_integrated_inbox_title">Iniciar na Bandexa unificada</string>
     <string name="start_integrated_inbox_summary">Amosar a Bandexa de Entrada unificada ao inicio</string>
 

res/values-hu/strings.xml

@@ -875,9 +875,6 @@
     <string name="volume_navigation_message">Leveleknél</string>
     <string name="volume_navigation_list">Lista nézetek váltása</string>
 
-    <string name="manage_back_title">A \"Vissza\" gomb működése</string>
-    <string name="manage_back_summary">Használva lépjen vissza egy szintet</string>
-
     <string name="start_integrated_inbox_title">Kezdőlap az Összevont mappa</string>
     <string name="start_integrated_inbox_summary">Összes beérkezett levél mappa jelenjen meg indításkor</string>
 

res/values-it/strings.xml

@@ -882,9 +882,6 @@ http://k9mail.googlecode.com/
     <string name="volume_navigation_message">Visualizzazione messaggi</string>
     <string name="volume_navigation_list">Diverse visualizzazioni di elenco</string>
 
-    <string name="manage_back_title">Gestisci pulsante \"Indietro\"</string>
-    <string name="manage_back_summary">\"Indietro\" sale sempre di un livello</string>
-
     <string name="start_integrated_inbox_title">Avvia in Posta in arrivo unificata</string>
     <string name="start_integrated_inbox_summary">Visualizza la Posta in arrivo unificata dopo l\'avvio</string>
 

res/values-iw/strings.xml

@@ -893,9 +893,6 @@ http://k9mail.googlecode.com/
     <string name="volume_navigation_message">הצגת הודעה</string>
     <string name="volume_navigation_list">רשימת תצוגות שונות</string>
 
-    <string name="manage_back_title">נהל כפתור \'חזור\'</string>
-    <string name="manage_back_summary">הגדר שכפתור \"חזור\" תמיד יחזור דף אחד</string>
-
     <string name="start_integrated_inbox_title">התחל בתיבת דואר נכנס אחידה</string>
     <string name="start_integrated_inbox_summary">הצג את תיבת הדואר הנכנס האחידה בהפעלה</string>
 

res/values-ja/strings.xml

@@ -875,9 +875,6 @@ K-9 Mail セットアップにようこそ。\nK-9 は標準のAndroidメール
     <string name="volume_navigation_message">メッセージ表示</string>
     <string name="volume_navigation_list">各種一覧表示</string>
 
-    <string name="manage_back_title">\"戻る\" ボタンの制御</string>
-    <string name="manage_back_summary">\"戻る\" ボタンで常に一つ前に戻る</string>
-
     <string name="start_integrated_inbox_title">統合フォルダで始める</string>
     <string name="start_integrated_inbox_summary">起動後に統合フォルダを表示する</string>
 

res/values-ko/strings.xml

@@ -878,9 +878,6 @@ K-9 메일 설치를 환영합니다.  K-9은 표준 안드로이드 메일 클
     <string name="volume_navigation_message">메시지 뷰</string>
     <string name="volume_navigation_list">다양한 리스트 뷰</string>
 
-    <string name="manage_back_title"> \"뒤로\" 버튼 관리</string>
-    <string name="manage_back_summary">\"뒤로\" 버튼이 항상 위로</string>
-
     <string name="start_integrated_inbox_title">통합 편지함으로 시작</string>
     <string name="start_integrated_inbox_summary">통합 편지함을 시작시 보여줍니다</string>
 

res/values-nl/strings.xml

@@ -877,9 +877,6 @@ http://k9mail.googlecode.com/
     <string name="volume_navigation_message">Bericht beeld</string>
     <string name="volume_navigation_list">Variabele lijst beelden</string>
 
-    <string name="manage_back_title">Beheer \"Terug\" knop</string>
-    <string name="manage_back_summary">Laat \"Terug\" altijd 1 niveau omhoog gaan</string>
-
     <string name="start_integrated_inbox_title">Geïntegreerde Inbox bij start</string>
     <string name="start_integrated_inbox_summary">Laat de geïntegreerde Inbox zien na opstarten</string>
 

res/values-pl/strings.xml

@@ -910,9 +910,6 @@ http://k9mail.googlecode.com/
     <string name="volume_navigation_message">Wygląd wiadomości</string>
     <string name="volume_navigation_list">Różne widoki list</string>
 
-    <string name="manage_back_title">Przycisk \"Cofnij\"</string>
-    <string name="manage_back_summary">Przycisk \"Cofnij\" zawsze cofa o jeden poziom wyżej</string>
-
     <string name="start_integrated_inbox_title">Pokaż zintegrowaną</string>
     <string name="start_integrated_inbox_summary">Wyświetl \"Zintegrowana odbiorcza\" po uruchomieniu programu</string>
 

res/values-pt-rBR/strings.xml

@@ -877,9 +877,6 @@ http://k9mail.googlecode.com/
     <string name="volume_navigation_message">Visualizar mensagem</string>
     <string name="volume_navigation_list">Vários modos de exibição da lista</string>
 
-    <string name="manage_back_title">Gerenciar botão \"Voltar\"</string>
-    <string name="manage_back_summary">Tormar \"Voltar\" padrão para subir um nível</string>
-
     <string name="start_integrated_inbox_title">Iniciar com Caixas de Entrada Unificadas</string>
     <string name="start_integrated_inbox_summary">Mostra Caixas Unificadas ao abrir o K-9 Mail</string>
 

res/values-ru/strings.xml

@@ -874,9 +874,6 @@ http://k9mail.googlecode.com/
     <string name="volume_navigation_message">Сообщение</string>
     <string name="volume_navigation_list">Различные списки элементов</string>
 
-    <string name="manage_back_title">Использовать кнопку \"Назад\"</string>
-    <string name="manage_back_summary">\"Назад\" всегда возвращает на уровень вверх</string>
-
     <string name="start_integrated_inbox_title">Входить в общий ящик при запуске</string>
     <string name="start_integrated_inbox_summary">Показать общий ящик сообщений после запуска</string>
 

res/values-sv/strings.xml

@@ -881,9 +881,6 @@ http://k9mail.googlecode.com/
     <string name="volume_navigation_message">E-post-vy</string>
     <string name="volume_navigation_list">Diverse listvyer</string>
 
-    <string name="manage_back_title">Hantera \"Tillbaka\"-knappen</string>
-    <string name="manage_back_summary">\"Tillbaka\"-knappen går alltid upp en nivå</string>
-
     <string name="start_integrated_inbox_title">Integrerad inkorg vid start</string>
     <string name="start_integrated_inbox_summary">Visa den integrerade inkorgen vid start</string>
 

res/values-tr/strings.xml

@@ -881,9 +881,6 @@ http://k9mail.googlecode.com/ adresine gönderin.
     <string name="volume_navigation_message">Mesaj görünümü</string>
     <string name="volume_navigation_list">Çeşitli liste görünümleri</string>
 
-    <string name="manage_back_title">\"Geri\" düğmesini yönet</string>
-    <string name="manage_back_summary">\"Geri\" düğmesi daima bir üst seviyeye çıkartır</string>
-
     <string name="start_integrated_inbox_title">Birleşik Gelen Kutusu ile başla</string>
     <string name="start_integrated_inbox_summary">Başlangıçta Birleşik Gelen Kutusunu göster</string>
 

res/values-uk/strings.xml

@@ -880,9 +880,6 @@ http://k9mail.googlecode.com/
     <string name="volume_navigation_message">Перегляд повідомлень</string>
     <string name="volume_navigation_list">Різноманітні списки елементів</string>
 
-    <string name="manage_back_title">Управління кнопкою „Назад“</string>
-    <string name="manage_back_summary">„Назад“ завжди повертає на рівень вгору</string>
-
     <string name="start_integrated_inbox_title">При запуску відкривати спільну папку „Вхідні“</string>
     <string name="start_integrated_inbox_summary">Показати спільну папку „Вхідні“ після запуску</string>
 

res/values-zh-rCN/strings.xml

@@ -869,9 +869,6 @@
     <string name="volume_navigation_message">信息视图</string>
     <string name="volume_navigation_list">不同的列表视图</string>
 
-    <string name="manage_back_title">管理“返回”按钮</string>
-    <string name="manage_back_summary">每次点击“返回”按钮时都向上返回一个层次</string>
-
     <string name="start_integrated_inbox_title">从全局收件箱启动</string>
     <string name="start_integrated_inbox_summary">启动后显示全局收件箱</string>
 

res/values-zh-rTW/strings.xml

@@ -887,9 +887,6 @@
     <string name="volume_navigation_message">訊息檢視</string>
     <string name="volume_navigation_list">不同的訊息檢視列表</string>
 
-    <string name="manage_back_title">管理「返回」按鈕</string>
-    <string name="manage_back_summary">每次點擊「返回」按鈕時返回上一個頁面</string>
-
     <string name="start_integrated_inbox_title">從全域收件匣啟動</string>
     <string name="start_integrated_inbox_summary">啟動後顯示全域收件匣</string>
 

res/values/strings.xml

@@ -79,7 +79,7 @@ http://k9mail.googlecode.com/
     <string name="about_title_fmt">About <xliff:g id="app_name">%s</xliff:g></string>
     <string name="accounts_title">Accounts</string>
     <string name="welcome_message_title">Welcome to K-9 Mail!</string>
-	<string name="folders_title">Folders</string>
+    <string name="folders_title">Folders</string>
     <string name="advanced">Advanced</string>
     <string name="folder_list_title"><xliff:g id="account">%s</xliff:g> </string>
 
@@ -892,9 +892,6 @@ http://k9mail.googlecode.com/
     <string name="volume_navigation_message">Message view</string>
     <string name="volume_navigation_list">Various list views</string>
 
-    <string name="manage_back_title">Manage \"Back\" button</string>
-    <string name="manage_back_summary">Make \"Back\" always go up a level</string>
-
     <string name="start_integrated_inbox_title">Start in Unified Inbox</string>
     <string name="start_integrated_inbox_summary">Show the Unified Inbox after startup</string>
 

res/xml/global_preferences.xml

@@ -203,12 +203,6 @@
             android:positiveButtonText="@android:string/ok"
             android:negativeButtonText="@android:string/cancel" />
 
-        <CheckBoxPreference
-            android:persistent="false"
-            android:key="manage_back"
-            android:title="@string/manage_back_title"
-            android:summary="@string/manage_back_summary" />
-
         <CheckBoxPreference
             android:persistent="false"
             android:key="messageview_return_to_list"
@@ -230,48 +224,48 @@
             android:positiveButtonText="@android:string/ok"
             android:negativeButtonText="@android:string/cancel" />
 
-		<PreferenceScreen
+        <PreferenceScreen
-			android:title="@string/global_settings_batch_buttons"
+            android:title="@string/global_settings_batch_buttons"
-			android:summary="@string/global_settings_batch_buttons_summary"
+            android:summary="@string/global_settings_batch_buttons_summary"
-			android:key="batch_buttons_settings">
+            android:key="batch_buttons_settings">
 
-			<CheckBoxPreference
+            <CheckBoxPreference
-				android:persistent="false"
+                android:persistent="false"
-				android:key="batch_buttons_mark_read"
+                android:key="batch_buttons_mark_read"
-				android:title="@string/global_settings_mark_read"
+                android:title="@string/global_settings_mark_read"
-			/>
+            />
 
-			<CheckBoxPreference
+            <CheckBoxPreference
-				android:persistent="false"
+                android:persistent="false"
-				android:key="batch_buttons_delete"
+                android:key="batch_buttons_delete"
-				android:title="@string/global_settings_delete"
+                android:title="@string/global_settings_delete"
-			/>
+            />
 
-			<CheckBoxPreference
+            <CheckBoxPreference
-				android:persistent="false"
+                android:persistent="false"
-				android:key="batch_buttons_archive"
+                android:key="batch_buttons_archive"
-				android:title="@string/global_settings_archive"
+                android:title="@string/global_settings_archive"
-			/>
+            />
 
-			<CheckBoxPreference
+            <CheckBoxPreference
-				android:persistent="false"
+                android:persistent="false"
-				android:key="batch_buttons_move"
+                android:key="batch_buttons_move"
-				android:title="@string/global_settings_move"
+                android:title="@string/global_settings_move"
-			/>
+            />
 
-			<CheckBoxPreference
+            <CheckBoxPreference
-				android:persistent="false"
+                android:persistent="false"
-				android:key="batch_buttons_flag"
+                android:key="batch_buttons_flag"
-				android:title="@string/global_settings_flag"
+                android:title="@string/global_settings_flag"
-			/>
+            />
 
-			<CheckBoxPreference
+            <CheckBoxPreference
-				android:persistent="false"
+                android:persistent="false"
-				android:key="batch_buttons_unselect"
+                android:key="batch_buttons_unselect"
-				android:title="@string/global_settings_unselect"
+                android:title="@string/global_settings_unselect"
-			/>
+            />
 
-		</PreferenceScreen>
+        </PreferenceScreen>
 
     </PreferenceScreen>
 
@@ -325,11 +319,11 @@
             android:title="@string/misc_preferences_attachment_title"
             android:summary="@string/misc_preferences_attachment_description" />
 
-		<Preference
+        <Preference
-			android:persistent="false"
+            android:persistent="false"
-			android:title="@string/settings_attachment_default_path"
+            android:title="@string/settings_attachment_default_path"
-			android:key="attachment_default_path"
+            android:key="attachment_default_path"
-			android:summary="- PATH - set by activty -"/>
+            android:summary="- PATH - set by activty -"/>
     </PreferenceScreen>
 
     <PreferenceScreen

src/com/fsck/k9/K9.java

@@ -182,7 +182,6 @@ public class K9 extends Application {
     private static boolean mGesturesEnabled = true;
     private static boolean mUseVolumeKeysForNavigation = false;
     private static boolean mUseVolumeKeysForListNavigation = false;
-    private static boolean mManageBack = false;
     private static boolean mStartIntegratedInbox = false;
     private static boolean mMeasureAccounts = true;
     private static boolean mCountSearchMessages = true;
@@ -430,7 +429,6 @@ public class K9 extends Application {
         editor.putBoolean("gesturesEnabled", mGesturesEnabled);
         editor.putBoolean("useVolumeKeysForNavigation", mUseVolumeKeysForNavigation);
         editor.putBoolean("useVolumeKeysForListNavigation", mUseVolumeKeysForListNavigation);
-        editor.putBoolean("manageBack", mManageBack);
         editor.putBoolean("mobileOptimizedLayout", mMobileOptimizedLayout);
         editor.putBoolean("quietTimeEnabled", mQuietTimeEnabled);
         editor.putString("quietTimeStarts", mQuietTimeStarts);
@@ -588,7 +586,6 @@ public class K9 extends Application {
         mGesturesEnabled = sprefs.getBoolean("gesturesEnabled", false);
         mUseVolumeKeysForNavigation = sprefs.getBoolean("useVolumeKeysForNavigation", false);
         mUseVolumeKeysForListNavigation = sprefs.getBoolean("useVolumeKeysForListNavigation", false);
-        mManageBack = sprefs.getBoolean("manageBack", false);
         mStartIntegratedInbox = sprefs.getBoolean("startIntegratedInbox", false);
         mMeasureAccounts = sprefs.getBoolean("measureAccounts", true);
         mCountSearchMessages = sprefs.getBoolean("countSearchMessages", true);
@@ -779,14 +776,6 @@ public class K9 extends Application {
         mUseVolumeKeysForListNavigation = enabled;
     }
 
-    public static boolean manageBack() {
-        return mManageBack;
-    }
-
-    public static void setManageBack(boolean manageBack) {
-        mManageBack = manageBack;
-    }
-
     public static boolean mobileOptimizedLayout() {
         return mMobileOptimizedLayout;
     }

src/com/fsck/k9/activity/setup/Prefs.java

@@ -24,7 +24,6 @@ import com.fsck.k9.K9;
 import com.fsck.k9.K9.NotificationHideSubject;
 import com.fsck.k9.Preferences;
 import com.fsck.k9.R;
-import com.fsck.k9.activity.Accounts;
 import com.fsck.k9.activity.ColorPickerDialog;
 import com.fsck.k9.activity.K9PreferenceActivity;
 import com.fsck.k9.helper.DateFormatter;
@@ -54,7 +53,6 @@ public class Prefs extends K9PreferenceActivity {
     private static final String PREFERENCE_ANIMATIONS = "animations";
     private static final String PREFERENCE_GESTURES = "gestures";
     private static final String PREFERENCE_VOLUME_NAVIGATION = "volumeNavigation";
-    private static final String PREFERENCE_MANAGE_BACK = "manage_back";
     private static final String PREFERENCE_START_INTEGRATED_INBOX = "start_integrated_inbox";
     private static final String PREFERENCE_CONFIRM_ACTIONS = "confirm_actions";
     private static final String PREFERENCE_NOTIFICATION_HIDE_SUBJECT = "notification_hide_subject";
@@ -97,7 +95,6 @@ public class Prefs extends K9PreferenceActivity {
     private CheckBoxPreference mAnimations;
     private CheckBoxPreference mGestures;
     private CheckBoxListPreference mVolumeNavigation;
-    private CheckBoxPreference mManageBack;
     private CheckBoxPreference mStartIntegratedInbox;
     private CheckBoxListPreference mConfirmActions;
     private ListPreference mNotificationHideSubject;
@@ -193,9 +190,6 @@ public class Prefs extends K9PreferenceActivity {
         mVolumeNavigation.setItems(new CharSequence[] {getString(R.string.volume_navigation_message), getString(R.string.volume_navigation_list)});
         mVolumeNavigation.setCheckedItems(new boolean[] {K9.useVolumeKeysForNavigationEnabled(), K9.useVolumeKeysForListNavigationEnabled()});
 
-        mManageBack = (CheckBoxPreference)findPreference(PREFERENCE_MANAGE_BACK);
-        mManageBack.setChecked(K9.manageBack());
-
         mStartIntegratedInbox = (CheckBoxPreference)findPreference(PREFERENCE_START_INTEGRATED_INBOX);
         mStartIntegratedInbox.setChecked(K9.startIntegratedInbox());
 
@@ -412,7 +406,6 @@ public class Prefs extends K9PreferenceActivity {
         K9.setCompactLayouts(compactLayouts.isChecked());
         K9.setUseVolumeKeysForNavigation(mVolumeNavigation.getCheckedItems()[0]);
         K9.setUseVolumeKeysForListNavigation(mVolumeNavigation.getCheckedItems()[1]);
-        K9.setManageBack(mManageBack.isChecked());
         K9.setStartIntegratedInbox(!mHideSpecialAccounts.isChecked() && mStartIntegratedInbox.isChecked());
         K9.setConfirmDelete(mConfirmActions.getCheckedItems()[0]);
         K9.setConfirmDeleteStarred(mConfirmActions.getCheckedItems()[1]);
@@ -471,16 +464,6 @@ public class Prefs extends K9PreferenceActivity {
         super.onPause();
     }
 
-    @Override
-    public void onBackPressed() {
-        if (K9.manageBack()) {
-            Accounts.listAccounts(this);
-            finish();
-        } else {
-            super.onBackPressed();
-        }
-    }
-
     private void onFontSizeSettings() {
         FontSizeSettings.actionEditSettings(this);
     }

src/com/fsck/k9/preferences/GlobalSettings.java

@@ -140,9 +140,6 @@ public class GlobalSettings {
         s.put("language", Settings.versions(
                 new V(1, new LanguageSetting())
             ));
-        s.put("manageBack", Settings.versions(
-                new V(1, new BooleanSetting(false))
-            ));
         s.put("measureAccounts", Settings.versions(
                 new V(1, new BooleanSetting(true))
             ));

src/com/fsck/k9/preferences/Settings.java

@@ -35,7 +35,7 @@ public class Settings {
      *
      * @see SettingsExporter
      */
-    public static final int VERSION = 14;
+    public static final int VERSION = 15;
 
     public static Map<String, Object> validate(int version, Map<String,
             TreeMap<Integer, SettingsDescription>> settings,