* Filter the file path to the shortcode
* @since 1.0.0
* @param (string)     $shortcode_file     filename of the shortcode file
* @return (string)     $shortcode_file     filename of the shortcode file

The shortcode [ticket-create] is using two different template files for the shortcode output. With this filter you can alter the path to the template file, which renders the form itself. Is used by sts_ticket_create()