Bug 575716 - SingleReference control only shows link text after resize
on Windows

Avoid zero-sized hyperlink by triggering an async re-layout of its
composite. It runs after the value of the hyperlink was updated and,
thus, fixes the issue.

Change-Id: I81e5a8e85c11a3b3391ccae4740f5c363d93e67b
Signed-off-by: Lucas Koehler <lkoehler@eclipsesource.com>