[window] Don't allow resizing in fullscreen mode
[window] Don't allow resizing in fullscreen mode

If a window is in fullscreen mode, don't allow it to be resized. Also,
if switching to small-screen mode, make sure to switch out of
full-screen mode first.

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