JXClient key binding changes

[Ryo]

Hello.


Some changes were made to JXClient's handling of keybindings.

As a consequence, existing keybindings may be broken.


Solution is to unbind as appropriate, and rebind shortcuts.


If needed, keybindings can be edited manually by checking $HOME/.crossfire/jxclient/keybindings*.txt


Apologies for the inconvenience.