qt: Add option to apply fullscreen stretching modes when maximized

src/qt/qt_rendererstack.hpp

@@ -32,6 +32,10 @@ public:
     void wheelEvent(QWheelEvent *event) override;
     void leaveEvent(QEvent *event) override;
     void closeEvent(QCloseEvent *event) override;
+    void resizeEvent(QResizeEvent *event) override
+    {
+        onResize(event->size().width(), event->size().height());
+    }
     void keyPressEvent(QKeyEvent *event) override
     {
         event->ignore();