x11: Ignore FocusOut with mode = NotifyUngrab
x11: Ignore FocusOut with mode = NotifyUngrab

Not sure why we get these, but it happens for Alt-click to move a window
(metacity binding) and messes up the idle inhibit counter.
FocusOut event as a result of ungrabbing doesn't really make sense and
fortunately we can safely ignore them.

kwm81/weston,sir-murray/weston,krezovic/weston,udoprog/weston,giucam/weston,Gnurou/weston,udoprog/weston,Tarnyko/weston-xdg_surface_present,jonnylamb/weston,kwm81/weston,eyolfson/weston,Gnurou/weston,Fantu/compositor-spice,Fantu/compositor-spice,giucam/weston,jonnylamb/weston,xorgy/weston,krezovic/weston,Fantu/compositor-spice,sir-murray/weston,mchalupa/weston,xorgy/weston,eyolfson/weston,Tarnyko/weston-xdg_surface_present,mchalupa/weston