MAINT: Re-enable build-varible check

src/core/js/ext_bookmarks.js

@@ -652,8 +652,7 @@ var ext_bookmarks = function ($, logger, config) {
             }, true);
         }
 
-        if (true) {
-            // if ("${BUILD_MODULE_EXT_ADD_QUERY_TO_BOOKMARKS}" == "ENABLED") {
+        if ("${BUILD_MODULE_EXT_ADD_QUERY_TO_BOOKMARKS}" == "ENABLED") {
             add_add_query_results_button();
         }
     }