shell: Reset fullscreen and maximized state on output unplug
shell: Reset fullscreen and maximized state on output unplug

When a view is moved to another output because its current output was
unplugged, remove the fullscreen and maximized state.

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