Config option to disable key bindings for the history module

[yaroslavputria]

Could you please add config option (enabled by default) for the history module to enable key bindings? - to have possibility to disable undo/redo shortcuts.

My case: I have custom sharedb undoRedo module for multiple editors - I need to have one combination of key bindings for all of the editors - even if the focus is set to a different editor, the last undo/redo should be invoked by shortcut.