Polylang Pro 3.6.5

* Pro: Fix a conflict with Kadence blocks
* Pro: Fix a conflict with Flatsome builder
* Fix media translation setting having no effect

* Pro: Fix creation of WC product categories with shared slug via REST API
* Pro: Fix conflict with WooBuilder when editing a WC product
* Fix: Force empty string translation to empty string #1058
* Fix CSS conflict with Dynamic content for Elementor #1060

* Pro: Remove "Navigation menus" from the post type settings list
* Pro: Fix block editor languages panel missing in WordPress 5.6
* Pro: Fix wrongly indexed languages list returned by REST API when the first language is deactivated.
* Revert fix for category feed not redirected when the language code is wrong #1054
* Fix wrong redirect of category when the url includes a query string #1048
* Fix querying multiple categories failing