ISTWCMS-6944: add pub ref search block to ensure that label is used correctly

uw_custom_blocks.module

@@ -634,6 +634,7 @@ function uw_custom_blocks_preprocess_block(&$variables) {
     'uw_cbl_services_search',
     'uw_cbl_project_search',
     'uw_cbl_catalog_search',
+    'uw_cbl_publication_search',
   ];
 
   // If this is a search block add the label stuff to the variables.