YITH WooCommerce Affiliates Premium 3.5.0

* New: support for WooCommerce 4.2
* Tweak: fixed wrong text domain for some strings
* Tweak: improved appearance of affiliate details panel
* Fix: losing status selection after filtering on admin views
* Dev: added yith_wcaf_comission_table_columns filter
* Dev: added yith_wcaf_create_item_commission filter
* Dev: added yith_wcaf_enqueue_fontello_stylesheet filter
* Dev: added yith_wcaf_ipn_listener_apply_custom_cainfo filter for IPN validation curl call
* Dev: added yith_wcaf_ipn_listener_custom_cainfo filter for IPN validation curl call
* Dev: added yith_wcaf_ipn_listener_apply_custom_httpheader filter for IPN validation curl call
* Dev: added yith_wcaf_ipn_listener_custom_httpheader filter for IPN validation curl call
* Dev: add second parameter on yith_wcaf_use_percentage_rates hook

* New: support for WooCommerce 4.1
* Update: plugin framework
* Tweak: removed max attribute from payment threshold field
* Tweak: hotfix paypal return url, to set back affiliate cookie when getting back to site after cancelling order
* Fix: removed translation on screen id, that was causing missing assets on admin on non-english sites
* Dev: added yith_wcaf_withdraw_amount_allow_exceeding_max filter

* New: support for WordPress 5.4
* New: support for WooCommerce 4.0
* New: Greek translation
* New: added option to set up affiliates cookie via AJAX call (to better work with cache systems)
* New: added Elementor widgets
* Tweak: included variations in Excluded products field
* Tweak: include commissions and commissions history metaboxes into WC Subscription edit page
* Tweak: code reformat and improvements for PHPCS
* Update: plugin framework
* Fix: pending commission email for admin is not sent if the commission amount is zero or not exists
* Fix: removed duplicated id from form-referrer box
* Dev: added new filter yith_wcaf_customer_status_change_dashboard_url
* Dev: added new filter yith_wcaf_show_message_wc_print_notice