Approval in backend

backend/cs/action.json

@@ -114,6 +114,7 @@
         "contact_input": "Add a new contact",
         "loan_input": "Add a new loan",
         "exhibition_input": "Add a new exhibition",
-        "series_input": "Add a new series"
+        "series_input": "Add a new series",
+        "source_input": "Add a new source"
     }
 }