Approval in backend

backend/nl/object_addendum.json

@@ -246,7 +246,8 @@
         "disposal_authorized_date": "Disposal authorization date",
         "disposal_authorized_date_explica": "Date the authorization for the object's disposal was given.",
         "disposal_reason_explica": "Free text explanation for why the object is to be or was deaccessioned.",
-        "deaccession": "Deaccession"
+        "deaccession": "Deaccession",
+        "movement_reference_number": "Movement reference number"
     },
     "ortart": [
         "",