Add sortable listener.

main/inc/lib/database.lib.php

@@ -149,8 +149,14 @@ class Database
             $sysPath."vendor/gedmo/doctrine-extensions/lib"
         );
 
-        $timestampableListener = new \Gedmo\Timestampable\TimestampableListener();
-        $entityManager->getEventManager()->addEventSubscriber($timestampableListener);
+        $listener = new \Gedmo\Timestampable\TimestampableListener();
+        $entityManager->getEventManager()->addEventSubscriber($listener);
+
+        $listener = new \Gedmo\Tree\TreeListener();
+        $entityManager->getEventManager()->addEventSubscriber($listener);
+
+        $listener = new \Gedmo\Sortable\SortableListener();
+        $entityManager->getEventManager()->addEventSubscriber($listener);
 
         $this->setConnection($entityManager->getConnection());
         $this->setManager($entityManager);