Make the folder selector use a new K9 dialog theme so it looks like a popup rather than the whole current app context

(This wouldn't be necessary, but the builtin dialog styles are broken for light themes before cupcake)

AndroidManifest.xml

@@ -62,6 +62,7 @@
         </activity>
         <activity
             android:name="com.android.email.activity.ChooseFolder"
+            android:theme="@style/Theme.K9Dialog"
             android:label="@string/choose_folder_title"
             >
         </activity>

res/values/styles.xml

@@ -0,0 +1,13 @@
+<resources>
+    <style name="Theme.K9Dialog" parent="@android:Theme.Light">
+        <item name="android:windowFrame">@null</item>
+        <item name="android:windowBackground">@drawable/popup_background</item>
+        <item name="android:attr/windowTitleStyle">?android:attr/textAppearanceLargeInverse</item>
+        <item name="android:windowIsFloating">true</item>
+        <item name="android:windowAnimationStyle">@android:style/Animation.Dialog</item>
+        <item name="android:windowContentOverlay">@drawable/panel_separator</item>
+
+    </style>
+
+
+</resources>