Ref T239, removed "QTimer m_xxx { this };" pattern

* not in worker classes as parent might have a relevance there
* in UI classes it is useless

src/blackgui/components/aircraftpartshistory.h

@@ -39,7 +39,7 @@ namespace BlackGui
 
         private:
             QScopedPointer<Ui::CAircraftPartsHistory> ui;
-            QTimer m_timerUpdateHistory { this };
+            QTimer m_timerUpdateHistory;
             QTextDocument m_text { this };
             uint m_htmlHash = 0;