Merge pull request #4540 from guardian/jsh/fix-filter-fields

Fix an issue where typing e.g. -sport{Enter} would not-dechip the input to produce the plain query -sport

Author: jonathonherbert

kahuna/public/js/search/structured-query/structured-query.js

@@ -51,7 +51,7 @@ grStructuredQuery.controller("grStructuredQueryCtrl", [
         .debounce(500);
 
       ctrl.getSuggestions = querySuggestions.getChipSuggestions;
-      ctrl.filterFields = querySuggestions.filterFields;
+      ctrl.filterFields = querySuggestions.typeaheadFields.map(_ => _.fieldName);
 
       function valOrUndefined(str) {
         // Watch out for `false`, but we know it's a string here..