Only set no background when using non-transparent windows so that we can actually see the app below the window
Only set no background when using non-transparent windows so that
we can actually see the app below the window

meego-tablet-ux/meego-ux-daemon,meego-tablet-ux/meego-ux-daemon,meego-tablet-ux/meego-ux-daemon,meego-tablet-ux/meego-ux-daemon