Disabled searching untranslated keys for uk (#976)

Co-authored-by: Matus Kasak <matus.kasak@dataquest.sk>

Author: Kasinhou

config/config.uk.ui.tests.json

@@ -9,7 +9,8 @@
     "has_license_select": true,
     "has_size_input": true,
     "has_size_dropdown": false,
-    "has_identifier_input": true
+    "has_identifier_input": true,
+    "can_search_untranslated_keys": false
   },
   "locators": {
     "title": "LINDAT/CLARIAH-CZ Repository Home",