Qml run controls automatically stop all run controls for the same file

That's something which has been asked for multiple times. Also related
to the task below.

Change-Id: I1130a2a3527479f18bde2abfbff28fb556f437b9
Task-Nr: QTCREATORBUG-3508
Reviewed-on: http://codereview.qt.nokia.com/1844


Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Kai Koehne <kai.koehne@nokia.com>