Update modifier state on focus in and out.
Update modifier state on focus in and out.

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