YITH WooCommerce Ajax Product Filter Premium 5.9.0

* New: support for WooCommerce 9.8
* New: add locale to Admin AJAX calls
* Tweak: localized locale for admin scripts
* Tweak: filter locale in admin when WPML is active
* Update: YITH plugin framework
* Fix: wrong taxonomy shown on loading more filters in the backend
* Dev: added new filter yith_wcan_filter_tax_get_term_children_count

* New: support for WooCommerce 9.3
* Update: YITH plugin framework
* Tweak: filter terms count even if no layared nav is applied
* Fix: return value for render method of yith_wcan_filters shortcode in case of error

* New: support for WooCommerce 8.9
* Update: YITH plugin framework
* Tweak: use specialized option for Variations filtering
* Tweak: changed cache system, to store fewer final results instead of heavier data still to be processed
* Tweak: stop caching variations filtering query result (high impact on db)
* Tweak: added cache for single variation id matching query
* Tweak: improved row meta handling
* Tweak: minor style changes to the admin panel
* Fix: improved handling of filterId and filterKey at backend, to avoid possible filters duplication/overriding when saving via AJAX
* Fix: prevent filters lazy loading when doing shortcode preview in Gutenberg
* Fix: problem with terms hierarchy when ancestor is not included among selected filters
* Fix: prevent terms pagination when returning 0 as terms_per_page
* Fix: wait 300ms before filtering after price slider action
* Fix: prevent horizontal toggle closing when clicking inside the toggle
* Fix: js error with MapIterators on FireFox
* Fix: terms selection field not working for new filters in Preset edit page
* Fix: term box not appearing in Preset edit page when selecting first term in search box
* Fix: restored correct behaviour for filters applied in YITH_WCAN_Query::get_query_relevant* methods (filter product ids instead of counts)
* Dev: added new yith_wcan_filter_open_button_class filter