[TASK] Allowing reset all languages

Classes/Controller/MailController.php

@@ -330,13 +330,13 @@ class MailController extends ActionController {
 	}
 
 	/**
-	 * reset template values to default state (delete from db)
+	 * reset template values to default state for a specific language (delete from db)
 	 *
 	 * @param string $template
-	 * @param string $language
 	 * @param string $extensionKey
+	 * @param string $language
 	 */
-	public function resetAction($template, $language, $extensionKey) {
+	public function resetAction($template, $extensionKey, $language = '') {
 		$this->templateRepository->deleteTemplate($extensionKey, $template, $language);
 
 		$message = LocalizationUtility::translate('backend.template_reset', 'sg_mail');