Approval in backend

backend/tr/exhibitions.json

@@ -60,6 +60,7 @@
         "venue": "Venue",
         "venue_explica": "Venue the exhibition is or was held in.",
         "organizer": "External organizer",
-        "organizer_explica": "Name of the external institution organizing the exhibition."
+        "organizer_explica": "Name of the external institution organizing the exhibition.",
+        "image_of_exhibition": "Image of exhibition"
     }
 }