Update blacklist.txt

Author: jessuppi

modules/wordpress/blacklist.txt

@@ -2040,6 +2040,9 @@ dummy_graylist_function_for_parsing
 ;; for exact directory matches use slashes e.g. /revslider/
 
 [utility]
+filester ; utility
+wp-duplicate-page ; utility
+guidant ; learning WordPress plugin (By WPCommerz)
 post-type-switcher ; utility (previously blacklisted but seems fine now)
 wp-crontrol ; utility
 enable-jquery-migrate-helper ; utility (By Automattic) aka jQuery Migrate library