creater user-dir, if non-existant and pressing 'Open Project Data Folder'

editor/editor_node.cpp

@@ -2545,6 +2545,8 @@ void EditorNode::_menu_option_confirm(int p_option, bool p_confirmed) {
 			}
 		} break;
 		case RUN_PROJECT_DATA_FOLDER: {
+			// ensure_user_data_dir() to prevent the edge case: "Open Project Data Folder" won't work after the project was renamed in ProjectSettingsEditor unless the project is saved
+			OS::get_singleton()->ensure_user_data_dir();
 			OS::get_singleton()->shell_open(String("file://") + OS::get_singleton()->get_user_data_dir());
 		} break;
 		case FILE_EXPLORE_ANDROID_BUILD_TEMPLATES: {