viewer: fix mouse and compositing issues from using windows

app/widget/manageddisplay/manageddisplay.h

@@ -38,14 +38,11 @@ public:
   ManagedDisplayWidgetOpenGL() = default;
 
 signals:
+  // Render signals
   void OnInit();
-
   void OnPaint();
-
   void OnDestroy();
 
-  void OnMouseMove(QMouseEvent* e);
-
 protected:
   virtual void initializeGL() override
   {
@@ -60,13 +57,6 @@ protected:
     emit OnPaint();
   }
 
-  virtual void mouseMoveEvent(QMouseEvent* e) override
-  {
-    emit OnMouseMove(e);
-
-    QOpenGLWindow::mouseMoveEvent(e);
-  }
-
 private slots:
   void DestroyListener()
   {
@@ -132,6 +122,8 @@ public:
    */
   void update();
 
+  virtual bool eventFilter(QObject *o, QEvent *e) override;
+
 public slots:
   /**
    * @brief Replaces the color transform with a new one
@@ -156,8 +148,6 @@ signals:
 
   void frameSwapped();
 
-  void InnerWidgetMouseMove(QMouseEvent* event);
-
 protected:
   /**
    * @brief Provides access to the color processor (nullptr if none is set)