This patch makes sure actions started via the context menu operate on
the correct message even when the message list changes and the 'adapter
position' accessible via the menu object points to another message.
When the message the menu was opened for is deleted the context menu
will be closed.
Previously the app crashed when upgrading the database failed. Now we
reset the database version and run the upgrade code again (recreating
all tables).
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.fsck.k9/com.fsck.k9.activity.UpgradeDatabases}: java.lang.NullPointerException
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2117)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2155)
at android.app.ActivityThread.access$700(ActivityThread.java:139)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1248)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:5062)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:795)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:558)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.NullPointerException
at android.app.Instrumentation.execStartActivity(Instrumentation.java:1409)
at android.app.Activity.startActivityForResult(Activity.java:3389)
at android.app.Activity.startActivityForResult(Activity.java:3350)
at android.app.Activity.startActivity(Activity.java:3562)
at android.app.Activity.startActivity(Activity.java:3528)
at com.fsck.k9.activity.UpgradeDatabases.launchOriginalActivity(UpgradeDatabases.java:183)
at com.fsck.k9.activity.UpgradeDatabases.onCreate(UpgradeDatabases.java:109)
at android.app.Activity.performCreate(Activity.java:5058)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1079)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2081)
... 11 more