elementary: Properly swallow wayland clients

elementary: Properly swallow wayland clients

This patch fixes an issue where wayland windows would not swallow
clients properly. Basically, we should be swallowing the elm window
layout directly rather than use a rectangle (as was previous). This
commit also waits until the internal elm theme has been applied to the
sd->edje object before adding the wayland window frame.

This commit has the added benefit of being able to remove an additional
Evas_Object from the internal data structure.

@fix

Signed-off-by: Chris Michael <cp.michael@samsung.com>