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

src/node_dialog_cloud.cpp

@@ -142,7 +142,7 @@ void NodeDialogCloud::load_thumbs_thread()
             std::string rgb;
             rgb.resize(Base64::DecodedLength(info[3]));
             Base64::Decode(info[3], &rgb);
-            ui::Image thumb;
+            Image thumb;
             thumb.create(width, height);
             thumb.copy_from((uint8_t*)rgb.data());