window.c: Don't allow moving a maximized window
window.c: Don't allow moving a maximized window

Ideally the shell would send an unmaximize event to the client when
we try to move a maximized window, but for now, let's just prevent
moving maximized windows.

https://bugs.freedesktop.org/show_bug.cgi?id=56296

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