focus-manager: Notify on move_focus
focus-manager: Notify on move_focus

Make sure that mx_focus_manager_move_focus notifies if the focus changes.

pwithnall/mx,clutter-project/mx,clutter-project/mx,jonnylamb/mx,pwithnall/mx,jonnylamb/mx,jonnylamb/mx,clutter-project/mx,pwithnall/mx,clutter-project/mx,jonnylamb/mx,pwithnall/mx