This works around a Cocoa bug that causes an exception and hang if the view is
being re-ordered within its current superview (as opposed to being moved to a
new superview).

This reverts commit 9fbc364e but adds some
conditions around the call to avoid the flicker on platforms where it's
unnecessary.
Signed-off-by: Ken Thomases <ken@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>