Core: Modernize

modernize-use-auto
modernize-use-nullptr
modernize-use-override
modernize-use-using
modernize-use-default-member-init (partially)

Change-Id: Idf10d7ffb1d98a04edc09a25c35e4e9e3abe87b5
Reviewed-by: Eike Ziller <eike.ziller@qt.io>

src/plugins/coreplugin/windowsupport.h

@@ -61,12 +61,12 @@ class WindowSupport : public QObject
     Q_OBJECT
 public:
     WindowSupport(QWidget *window, const Context &context);
-    ~WindowSupport();
+    ~WindowSupport() override;
 
     void setCloseActionEnabled(bool enabled);
 
 protected:
-    bool eventFilter(QObject *obj, QEvent *event);
+    bool eventFilter(QObject *obj, QEvent *event) override;
 
 private:
     void toggleFullScreen();