Merge pull request #615 from nextcloud/backport/610/stable21

[stable21] show add, del and restored files within by and self filter

lib/UserSettings.php

@@ -154,9 +154,14 @@ protected function getDefaultFromSetting($method, $type) {
 	 */
 	public function getNotificationTypes() {
 		$settings = $this->manager->getSettings();
-		return array_map(function (ActivitySettings $setting) {
+
+		$return = array_map(function (ActivitySettings $setting) {
 			return $setting->getIdentifier();
 		}, $settings);
+		if (array_search('file_changed', $return) !== false) {
+			array_push($return, 'file_created', 'file_deleted', 'file_restored');
+		}
+		return $return;
 	}
 
 	/**