[DrKonqi] Reliably quit when closing report assistant

The finished signal is not emitted when the dialog is just closed and neither is the reject signal.
Since the dialog is DeleteOnClose we can just connect to QObject::destroyed

Differential Revision: https://phabricator.kde.org/D1044

drkonqi/drkonqidialog.cpp

@@ -264,7 +264,8 @@ void DrKonqiDialog::startBugReportAssistant()
 #if HAVE_XMLRPCCLIENT
     ReportAssistantDialog * bugReportAssistant = new ReportAssistantDialog();
     bugReportAssistant->show();
-    connect(bugReportAssistant, SIGNAL(finished()), SLOT([] () { close(); }));
+    connect(bugReportAssistant, &QObject::destroyed, this, &DrKonqiDialog::reject);
+
     hide();
 #endif
 }