fix(exitError): Move cleanhtmljs() into `Lib.Util.php` and add missing include_once (refs #4872)

Move definition of cleanhtmljs() into `Lib.Util.php` and add missing
include_once("FDL/Lib.Util.php") in `Class.Action.php`.
fix(security): Prevent XSS in viewcard.php (refs #4917)
Merge pull request #1236 from eguaj/3.3-A4872

fix(security): Prevent XSS in viewcard.php (closes #4917)(closes #4872)