Approval in backend

backend/nl/data_history.json

@@ -74,6 +74,7 @@
         "remove_collection": "Remove collection",
         "move_space": "Moved to different space",
         "owner": "Ownership",
-        "defaults_for_new_object": "Defaults for new object page"
+        "defaults_for_new_object": "Defaults for new object page",
+        "deaccession": "Deaccession"
     }
 }