6feb0f9f55
This fixes the case where an output isn't at y = 0, where the panel height isn't correct for constraints. It also kills a bug - moving a window with a mod-drag off the top of the screen clamped earlier than it should. Signed-off-by: Derek Foreman <derekf@osg.samsung.com> Reviewed-by: Bryce Harrington <bryce@osg.samsung.com>