Approval in backend

backend/hsb/basis.json

@@ -234,6 +234,7 @@
         "open_in_new_tab": "Open in new tab",
         "internal": "Internal",
         "push_notifications": "Push notifications",
-        "notifications": "Notifications"
+        "notifications": "Notifications",
+        "subject": "Subject"
     }
 }