Approval in backend

backend/pl/exhibitions.json

@@ -61,6 +61,7 @@
         "venue_explica": "Venue the exhibition is or was held in.",
         "organizer": "External organizer",
         "organizer_explica": "Name of the external institution organizing the exhibition.",
-        "image_of_exhibition": "Image of exhibition"
+        "image_of_exhibition": "Image of exhibition",
+        "set_object_exhibition_space": "Select the space the object was located in during the exhibition."
     }
 }