This reverts commit efb90f6e7e.
Reason for revert: behavior change for signal listeners
Change-Id: Ibe3c5d496cd61a9fccab17a10cc9fda8334fc9d4
Reviewed-by: Björn Schäpers <qt-codereview@hazardy.de>
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>