* Fix Undo causing the game to hang when playing against most CECP engines
* Fix the History combo box, now again jumps throughout the history
* Fix figurine algebraic notation displaying the wrong figures for the pieces
* Bottom-right corner should be white (not black) in 3D view
* Fix upside-down board numbering when Black is on bottom
* Some fixes for when a game is autosaved/autoloaded
* Don't start a new game if the new game dialog is dismissed with the Esc key
* Fix game disappearing when Preferences is opened in fullscreen view
* Claim Draw
* Menu item is now insensitive until a draw can successfully be claimed, to
prevent confusion by the lack of user feedback when no draw is available
* Fixes for threefold repetition detection
* Fix detection of draws by the fifty-move rule
