Implement scrolling of moves in movelist using keyboard arrow keys

[nnickoloff1234]

Both in analysis and after a finished game (and during a game in progress as well) add the ability to scroll back to old moves and then forward using the keyboard like on lichess

[gbtami]

We already have arrow key support.
You can add more at https://github.com/gbtami/pychess-variants/blob/master/client/gameCtrl.ts#L175

[nnickoloff1234]

ok apparently this is only problem in bughouse