PowerPack for Beaver Builder 2.39.2

* Enhancement: Added logic to auto purge Beaver Builder cache after updating the plugin
* Fix: Content Grid - Posts were getting appended on changing filters in some cases
* Fix: Content Grid - Post spacing issue when values are not provided for other breakpoints
* Fix: Render CSS inline for saved template used in various Advanced Tabs, Accordion, Modal Box, Off-Canvas modules
* Development: Registration Form - Added hook pp_rf_before_user_register to perform additional validation

* Fix: Content Grid - Load More and Scroll pagination replacing existing posts in the wrapper instead of appending
* Fix: Content Grid - Convert "%" spacing unit to "px" for CSS grid layout

* Fix: Content Grid - Layout issue after the recent update in some cases
* Fix: Hover Cards 2 - Content alignement issue in Style 0