Approval.

backend/dsb/data_history.json

@@ -39,6 +39,10 @@
         "update_pgp_key": "PGP key updated",
         "more": "Additional information",
         "ticket_prices": "Ticket types",
-        "opening_hours": "Opening hours"
+        "opening_hours": "Opening hours",
+        "rooms": "Rooms",
+        "rooms;addition": "Added a new room",
+        "rooms;deletion": "Removed a room",
+        "ticket_type": "Ticket types"
     }
 }