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

src/app_cloud.cpp

@@ -4,13 +4,11 @@
 #include "node_progress_bar.h"
 #include "node_dialog_cloud.h"
 
-using namespace ui;
-
 void App::cloud_upload()
 {
     if (!canvas)
         return;
-    if (ui::Canvas::I->m_newdoc)
+    if (Canvas::I->m_newdoc)
     {
         auto msgbox = new NodeMessageBox();
         msgbox->m_manager = &layout;
@@ -23,7 +21,7 @@ void App::cloud_upload()
     else
     {
         auto upload_thread = [this] {
-            if (ui::Canvas::I->m_unsaved)
+            if (Canvas::I->m_unsaved)
             {
                 Canvas::I->project_save_thread(doc_path);
             }