Convert menus to XML.
Rearrange menu items.

Move Help and Preferences to the bottom of the deck picker menu.
Move About and Feedback into the Help submenu.
Move Undo to the first position of the reviewer action bar.
Make Undo always visible in the reviewer action bar.
Move Clear whiteboard to the second position of the reviewer action bar.
Move New deck, New filtered deck, and Import file into deck picker action bar as Add button.
Move Toggle whiteboard above Search in reviewer menu.
Move Add note into card browser action bar.
Remove Preferences from study options menu.
Remove Rotate from all menus.
Remove New filtered deck from study options menu.
Remove Whiteboard from action bar in reviewer.
Disable Select text for post-ICS devices.
Disable Select text if whiteboard is activated.
Merge pull request #276 from agrueneberg/convert-menus-to-xml

Convert menus to XML