YITH WooCommerce Gift Cards Premium 4.22.0

Tweak Compatibility with new Aelia version (4.6.5.180828)
Tweak Set gift card custom post type as exportable
Tweak filter to customize the "add to card" of the gift card
Tweak text changed for better understanding
Tweak Manual amount option displayed even with only one gift card price
Update .pot main language file
Update Spanish translation
Update Dutch language
Update Italian language
Fix Add price with WooCommerce configuration taxes to the cart
Dev remove pdfs after sending
Dev Race conditions - gift card duplicated
Dev adding admin panel javascript minimized

* New: New options for the form to apply the gift card code on the cart and checkout page
* Dev: gift this product on PHP Unit

* New: Settings Admin panel
* Tweak: plugin action links and row metas
* Tweak: prevent error with gift this product button on shop loop
* Tweak: added new status to the gift card table
* Tweak: Check the recipient names as array
* Update: Spanish translation
* Update: Dutch translation
* Updated: official documentation url of the plugin
* Fix: Fixed a issue with the AJAX Call in Frontend
* Fix: string gft to gift on privacy policy content
* Fix: Change the hook of the gift this product button in variable products
* Dev: adding the product to the gift this product template
* Dev: fixed the filter to the variation products with gift this product button
* Dev: checking YITH_Privacy_Plugin_Abstract for old plugin-fw versions
* Dev: adding new filters in the checkout order tables
* Dev: PHPUnit