Add progress bar when update scene groups

Author: jsjtxietian

editor/editor_file_system.cpp

@@ -1657,8 +1657,10 @@ void EditorFileSystem::_queue_update_script_class(const String &p_path) {
 }
 
 void EditorFileSystem::_update_scene_groups() {
-	update_scene_mutex.lock();
+	EditorProgress ep("update_scene_groups", TTR("Update Scene Groups"), update_scene_paths.size());
+	int step_count = 0;
 
+	update_scene_mutex.lock();
 	for (const String &path : update_scene_paths) {
 		ProjectSettings::get_singleton()->remove_scene_groups_cache(path);
 
@@ -1674,6 +1676,8 @@ void EditorFileSystem::_update_scene_groups() {
 		if (!scene_groups.is_empty()) {
 			ProjectSettings::get_singleton()->add_scene_groups_cache(path, scene_groups);
 		}
+
+		ep.step(TTR("Updating Scene Groups..."), step_count++);
 	}
 
 	update_scene_paths.clear();