Add undo/redo keys

[ncrecc]

(referring to undo/redo ingame, not in the editor.)

a peculiar blind spot: there's an option for undo/redo to have dedicated buttons on the ui (though in BD artwork only undo appears), but you can't set a dedicated key shortcut for them.

not sure what the default keys for undo/redo should be (if any), though i plan to set undo to Z, as that's the undo key in a lot of newer puzzle games.

[Holger]

a peculiar blind spot: there's an option for undo/redo to have dedicated buttons on the ui (though in BD artwork only undo appears)

This bug (only undo button shown) should already be fixed, and the fix should be available with the next version soon.

but you can't set a dedicated key shortcut for them.

not sure what the default keys for undo/redo should be (if any), though i plan to set undo to Z, as that's the undo key in a lot of newer puzzle games.

Very good point -- adding key shortcuts should be easy to do, and might either have pre-defined default keys, or would be initially undefined.