panels: override Retranslate() rather than reimplementing changeEvent() in every derivative

app/panel/node/node.cpp

@@ -49,14 +49,6 @@ void NodePanel::DeleteSelected()
   node_view_->DeleteSelected();
 }
 
-void NodePanel::changeEvent(QEvent *e)
-{
-  if (e->type() == QEvent::LanguageChange) {
-    Retranslate();
-  }
-  PanelWidget::changeEvent(e);
-}
-
 void NodePanel::Retranslate()
 {
   SetTitle(tr("Node Editor"));

app/panel/node/node.h

@@ -37,9 +37,6 @@ public:
 
   virtual void DeleteSelected() override;
 
-protected:
-  virtual void changeEvent(QEvent* e) override;
-
 signals:
   /**
    * @brief Wrapper for NodeView::SelectionChanged()
@@ -47,7 +44,7 @@ signals:
   void SelectionChanged(QList<Node*> selected_nodes);
 
 private:
-  void Retranslate();
+  virtual void Retranslate() override;
 
   NodeView* node_view_;
 };