worked on 3D display

some ui changes
refactoring
new icons

mapview/3D/MapView3D.h

@@ -18,6 +18,8 @@ class MapView3D : public QOpenGLWidget {
 
 	Q_OBJECT
 
+	bool usePerspectiveProjection = false;
+
 public:
 
 	MapView3D(QWidget* parent = 0);
@@ -102,6 +104,12 @@ protected:
 	void mouseReleaseEvent(QMouseEvent* e);
 	void wheelEvent(QWheelEvent* e);
 
+signals:
+
+	void onShow3DFloorplan(bool show);
+	void onShow3DGrid(bool show);
+	void onShow3DNavMesh(bool show);
+
 private:
 	void draw();