快乐表单专业版 - 友好拖拽式联系表单构建器 1.38.9

* Update: WordPress 6.9.4 compatibility
* Fixed: Use explicit nullable types for PHP 8.4 compatibility

* Fixed: XSS Vulnerability on Additional CSS class(es).
* Fixed: XSS Vulnerability on Style Colors.

* Updated: Compatibility with WordPress 6.7.2

* Fixed: Typo

* Fixed: Logic to enable dorpdown value as email subject
* Fixed: Security issue on form submission allowing scripts to run
* Added: Fcuntionality to use tags in email content

* Fixed: MailPoet integration

* Fixed: Security issue on XSS scripting
* Fixed: Accessibility issues on Honeypot and Headings
* Tested up until verion 6.6.1 of Wordpress

* Fixed: Dynamic email subject issue.
* Fixed: Time field validation issue.

* Added: Hidden field as a new field.
* Added: Dynamic Email Subject.
* Fixed: Date styling on mobile.

* Fixed: Fixed Broken access control vulnerability.