Add icon to twofactor_backupcodes notification

Signed-off-by: Jan-Christoph Borchardt <hey@jancborchardt.net>

apps/twofactor_backupcodes/lib/Notifications/Notifier.php

@@ -60,6 +60,9 @@ class Notifier implements INotifier {
 				);
 
 				$notification->setLink($this->url->linkToRouteAbsolute('settings.PersonalSettings.index', ['section' => 'security']));
+
+				$notification->setIcon($this->url->getAbsoluteURL($this->url->imagePath('core', 'actions/password.svg')));
+
 				return $notification;
 
 			default:

apps/twofactor_backupcodes/tests/Unit/Notification/NotifierTest.php

@@ -117,7 +117,7 @@ class NotifierTest extends TestCase {
 			->willReturnSelf();
 		$notification->expects($this->once())
 			->method('setParsedMessage')
-			->with('You have enabled two-factor authentication but have not yet generated backup codes. Be sure to do this in case you lose access to your second factor.')
+			->with('You enabled two-factor authentication but did not generate backup codes yet. They are needed to restore access to your account in case you lose your second factor.')
 			->willReturnSelf();
 
 		$this->url->expects($this->once())