Fix sorting of threaded messages.
Merge pull request #242 from maniac103/fix-sort

Fix sorting of threaded messages.
Fix not marking messages as read on viewing
Don't call MessageListFragment methods until initialization is complete
German translation wording fix.
Make sure onSwitchComplete() is also called when animations are disabled
Don't blindly use the saved display mode value
changelogging
Bumped manifest to 4.325
Move "show all headers" into the menu (and out of the UI)
Move message view theme setting from message view menu to global prefs
by default.

The message view theme isn't something the user is likely to change on a
regular basis, so we don't need to clutter the message view menu with
this setting. The menu item can still be enabled for those who want it.
Remove text selection menu item for JB and higher.

Those versions have text selection support built-in (via long pressing
the WebView).
Allow changing the message composer theme (background and text color).
Convert theme setting value to an enum.
Compose: Don't just theme the editboxes, but the whole content (but not the actionbar)

This way also the From: selection, To:, Cc, and Bcc: are themed correctly.
It looks more homogeneous and is consistent with the looks of the MessageView.
Fix settings import/export
Add contact pictures to message list
Add setting to toggle contact pictures
Add setting for contact pictures to import/export code
Resize the contact picture bitmaps to the display size