a7350475e8
Struts are defined in terms of screen edges, so expand the rectangles we get via set_builtin_struts() accordingly. However we do want to allow chrome on edges between monitors, in which case the expansion would render an entire monitor unusable - don't expand the rectangles in that case, which means we will only use them for constraining windows but ignore them for the client-visible _NET_WORKAREA property. https://bugzilla.gnome.org/show_bug.cgi?id=730527