Reword "Open Project Data Folder" as "Open User Data Folder"

Clarifies that the button opens the user:// dir
and for better consistency with certain ProjectSettings values:

"Use Hidden Project Data Directory" is named similarly, but refers to data within res://
and two values refer to user:// as "User Dir"
(Translations were not updated)

and rename enum value accordingly

editor/editor_node.cpp

@@ -2771,8 +2771,8 @@ 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
+		case RUN_USER_DATA_FOLDER: {
+			// ensure_user_data_dir() to prevent the edge case: "Open User 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;
@@ -6434,7 +6434,7 @@ EditorNode::EditorNode() {
 	p->add_separator();
 	p->add_shortcut(ED_SHORTCUT_AND_COMMAND("editor/export", TTR("Export..."), Key::NONE, TTR("Export")), FILE_EXPORT_PROJECT);
 	p->add_item(TTR("Install Android Build Template..."), FILE_INSTALL_ANDROID_SOURCE);
-	p->add_item(TTR("Open Project Data Folder"), RUN_PROJECT_DATA_FOLDER);
+	p->add_item(TTR("Open User Data Folder"), RUN_USER_DATA_FOLDER);
 
 	plugin_config_dialog = memnew(PluginConfigDialog);
 	plugin_config_dialog->connect("plugin_ready", callable_mp(this, &EditorNode::_on_plugin_ready));

editor/editor_node.h

@@ -167,7 +167,7 @@ private:
 		RUN_PLAY_SCENE,
 		RUN_PLAY_CUSTOM_SCENE,
 		RUN_SETTINGS,
-		RUN_PROJECT_DATA_FOLDER,
+		RUN_USER_DATA_FOLDER,
 		RUN_RELOAD_CURRENT_PROJECT,
 		RUN_PROJECT_MANAGER,
 		RUN_VCS_METADATA,