can't move them to another workspace, and you currently don't see a
window moving that is not in the current workspace. (this fixes bug #135)
* Desktop::SetWindowBehind() didn't update the WorkspacesLayer.
* Changed Desktop::MoveWindowBy() to be able to move window on any workspace.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@16776 a95241bf-73f2-0310-859d-f6bbb57e9c96