remove ui namespace which is not really used, move CameraData in camera_modes.h to avoid the inclusion of canva.h

src/node_panel_grid.cpp

@@ -49,7 +49,7 @@ void NodePanelGrid::init_controls()
 
     m_hm_load->on_click = [this](Node*) {
         App::I.pick_image([this](std::string path) {
-            ui::Image img;
+            Image img;
             if (img.load_file(path))
             {
                 m_hm_image = img.resize(128, 128);