Profile Builder Pro - WordPress Profile Plugin 3.11.8

* Fixed a js error that was preventing a form to submit

* Refactored add-on page to unify add-ons and modules, also did some refactoring of folders
* Integrated Customization Toolbox addon as Advanced Settings in main plugin
* Integrated Placeholder labels addon in Advanced Settings
* Integrated Email Confirmation add-on as field in main plugin
* Integrated Multiple Admin Emails add-on in Advanced Settings
* Integrated Custom CSS Classes on fields add-on in main plugin
* Integrated GDPR Communication Preferences add-on in main plugin
* Integrated Import and Export add-on in main plugin
* Integrated Labels Edit add-on in main plugin
* Integrated Maximum Character Length add-on in main plugin
* Fix for bbPress Messages compatibility issue.
* Generalize Search All fix for the Select (Country) field and also apply it to the Search facet type.

* Changed some sanitization functions to more specific ones
* Add form name to 'User to edit' field ID so it works when multiple forms are on the same page.
* Add compatibility with the Divi Overlay plugin.
* Fixed a problem with values disappearing for some fields if the meta_name contained the word map