message: Show camera index also in GUI
diff: @@ -149,7 +149,9 @@ bool lightTypeUI_callback(void *, int index, const char **out_text)
  bool cameraUI_callback(void *, int index, const char **out_text)
  {
  - *out_text = g_sceneCameras.at_index(index).first.c_str();
  + static std::string outText;
  + outText = std::to_string(index) + ": " + g_sceneCameras.at_index(index).first;
  + *out_text = outText.c_str();
  return true;
  }
  