A bit of rework in bubbles:
*) Change saving mechanism: always save into RAM on any exit button, and offer an additional quit item in the game menu (so that 1 item doesn't save -> no disk spinup)
*) Change loading mechanism: always load on entering the game, but delete the save file still on actually resuming (that fixes weirdnesses with the level choosing menu item)
*) Remove the highscores from the bubbles struct.
*) Swap the "Start New Game" and "Resume Game" menu items to help against accidental deletion of progress.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@22116 a1c6a512-1295-4272-9138-f99709370657