(fix): notification from subscribe batch

Author: markharding

Helpers/Subscriptions.php

@@ -67,6 +67,7 @@ public static function subscribe($user_guid, $to_guid, $data = array())
                 'to'=>array($to_guid),
                 'entity' => $user_guid,
                 'notification_view' => 'friends',
+                'from' => $user_guid,
                 'params' => array()
                 ));