Approval in backend

backend/ru/action.json

@@ -113,6 +113,7 @@
         "linked_to_literature": "Linked to literature",
         "contact_input": "Add a new contact",
         "loan_input": "Add a new loan",
-        "exhibition_input": "Add a new exhibition"
+        "exhibition_input": "Add a new exhibition",
+        "series_input": "Add a new series"
     }
 }