- improve support for on the fly rotation of our window. Schedule the image update for a future frame so we don't block right away and clear the current image. This also fixes loading multiple images during a rotation as it takes time for geometry changes to apply to QT

src/imageswitcher.h

@@ -14,6 +14,7 @@ class ImageSwitcher : public QObject
 public:
     ImageSwitcher(MainWindow& w, unsigned int timeout, std::unique_ptr<ImageSelector>& selector);
     void start();
+    void scheduleImageUpdate();
 
 public slots:
     void updateImage();