Refactor QML Signal Handler to QML Signal Emit. This is because the
debugger breaks when a matching signal is emitted irrespective of
whether there is a handler connected to the signal.

Change-Id: I852ace75c1962290717ed127ac5938d7505b9a7e
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@nokia.com>
Reviewed-by: hjk <qthjk@ovi.com>