Polylang Pro 3.6.4

* 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

• Pro: Fix a fatal error when inserting a term
• Pro: Fix translation of the block cover when duplicating a post
• Pro: Fix a CSS issue in bulk tranlate form introduced by WP 6.0
• Pro: Fix a CSS issue in string import/export metaboxes.
• Prevent random languages order in WP 6.0 #1041
• Translate site title in retrieve password email #1042
• Fix \'lang\' attribute in language widget dropdown #1039