[4.0] Admin container menu (#34702)

Create a new admin menu and then an admin menu item of type system links ->component menu container

You will see the tree displayed twice

After the pr it is displayed just the once

Author: brianteeman

administrator/components/com_menus/tmpl/item/edit.php

@@ -133,11 +133,6 @@
 						$this->form->setFieldAttribute('publish_up', 'showon', '');
 						$this->form->setFieldAttribute('publish_down', 'showon', '');
 					}
-
-					if (!$isModal && $this->item->type == 'container')
-					{
-						echo $this->loadTemplate('container');
-					}
 					?>
 				<?php
 					// Set main fields.