• Support Android 6.0 (Marshmallow), will now ask for permissions.
• On Android 4.4 (KitKat) and up, you can now select custom (auto) backup files. These may be
  on external storage, Google Drive, etc. (provider needs to support Storage Access Framework).
• On Android 5.0 (Lollipop) and up, the app bar hides in some screens when scrolling.
• Restructured settings, open help page using Chrome custom tabs, other improvements.