added _NET_WM_FULLSCREEN_MONITORS
added possibility to span a window over all screens in fullscreen mode
added NET_WORKAREA behaviour: 0 (single/multimonitor with STRUT information, like metacity), 1 (always full desktop), 2 (singlemonitor with STRUT, multimonitor without STRUT)"
icewmbg: implemented scaled background; draw for each screen a background
hide borders if window is maximized