(Gestures) Ensure an update is done if gesture properties are updated.
[Problem] If gesture properties are updated and if there are no queued messaged from the event
thread, then update is still not run.
[Cause] Gesture properties are updated directly rather than via a message.
[Solution] Process gestures whenever we have an update, if the properties are updated, then we
should update the scene as well.
Change-Id: Ief1ee545fb7a3af289623cf100fe24e18f296569
Signed-off-by: David Steele <david.steele@partner.samsung.com>