Changes the position of @window in the Z-order (stacking order), so that
it is above @sibling (if @above is %TRUE) or below @sibling (if @above is
%FALSE).
If @sibling is %NULL, then this either raises (if @above is %TRUE) or
lowers the window.
If @window is a toplevel, the window manager may choose to deny the
request to move the window in the Z-order, gdk_window_restack() only
requests the restack, does not guarantee it.
Changes the position of @window in the Z-order (stacking order), so that it is above @sibling (if @above is %TRUE) or below @sibling (if @above is %FALSE).
If @sibling is %NULL, then this either raises (if @above is %TRUE) or lowers the window.
If @window is a toplevel, the window manager may choose to deny the request to move the window in the Z-order, gdk_window_restack() only requests the restack, does not guarantee it.