wl-desktop-shell: Fix issue where internal elm windows were not borderless
wl-desktop-shell: Fix issue where internal elm windows were not
borderless

This fixes the issue of elementary windows having 2 borders, however
it does expose a new issue where those same internal elm windows now
have a black shadow border around them.

Signed-off-by: Chris Michael <177aeddb9e34930a357ecd8dd2d21c80fe280c85@samsung.com>

rvandegrift/e,FlorentRevest/Enlightenment,tasn/enlightenment,tizenorg/platform.upstream.enlightenment,tasn/enlightenment,tizenorg/platform.upstream.enlightenment,tasn/enlightenment,rvandegrift/e,FlorentRevest/Enlightenment,tizenorg/platform.upstream.enlightenment,rvandegrift/e,FlorentRevest/Enlightenment