Approval in backend

backend/ru/data_history.json

@@ -95,6 +95,7 @@
         "categorization": "\u041a\u0430\u0442\u0435\u0433\u043e\u0440\u0438\u0437\u0430\u0446\u0438\u044f",
         "measurement": "\u0418\u0437\u043c\u0435\u0440\u0435\u043d\u0438\u044f",
         "open_versioning": "Open versioning",
-        "number": "Number"
+        "number": "Number",
+        "querying_data_history": "Querying data history"
     }
 }