Added source menu

application/config/services.yaml

@@ -21,6 +21,11 @@ services:
         factory: ['@app.menu_builder', 'userTopbar']
         tags:
             - { name: knp_menu.menu, alias: userTopbar }
+    app.menu.source:
+        class: Knp\Menu\MenuItem
+        factory: ['@app.menu_builder', 'sourceNavbar']
+        tags:
+            - { name: knp_menu.menu, alias: sourceNavbar }
     # makes classes in src/ available to be used as services
     # this creates a service per class whose id is the fully-qualified class name
     App\: