[Feature Request] Hide mouse cursor with `general.cursor_jump` enabled

[EdualcLaiv]

Having the cursor always at the center of the focused window is extremely handy, seeing the cursor jumping around is slightly distracting.

It would be nice to add the possibility to hide the cursor when following focus (since we always know where it should be) and un-hide it when manualy moved. It could be enabled and disabled in the config file with something like hide_following_cursor for example.