YITH WooCommerce Gift Cards Premium 4.10.0

* New: support to WordPress 5.2
* New: added a new option to disable the gift this product feature on specific products
* Tweak : avoid to apply gift cards when a WooCommerce Subscription product is in the cart
* Tweak : now, the gift cards appear in the account of the recipient user
* Update: updated Plugin Framework
* Update: Updated language file
* Update: Updated Italian translation
* Fix: display the manage stock checkbox in the product inventory tab
* Fix: fixed the lost image in the gift card template when the admin switch manually a physical gift card to virtual
* Fix: avoid the remove of the main recipient fields
* Fix: fixed the issue with the WoodMart sticky section
* Fix: fixed an issue with the gift card from the free version
* Fix: fixing an issue with the gift this product in variable products
* Dev: deleting error log
* Dev: deleting a WAITING string when the product image is loaded in the gift card template
* Dev: Added new admin texts to translate emails strings
* Dev: check if the hidden gift this product is gift card type
* Dev: added plugin-upgrade submodule

* New: support to WooCommerce 3.6.0 RC 1
* Tweak : Improve current date to timestamp conversion
* Update: updated Plugin Framework
* Fix: fixed Undefined index: yit_metaboxes
* Fix: fixed the z-index of the datepicker
* Dev: added a request to allow the custom add to cart url
* Dev: added a condition to check if the var is an object
* Dev: Added a condition to avoid if a gift card is a present.

* Tweak: Changed 'yith_ywgc_give_product_as_present' apply filter position in the condition.
* Tweak: Changed private to public function to notify when a gift card is used.
* Tweak: added the delivery data in the order info on my account
* Update: updated .pot file
* Update: updated Plugin Framework
* Update: updated FR .po and .mo
* Update: Updated Spanish translation
* Fix: fixed a string on German
* Fix: Fixed today time compare with delivery date time.
* Dev: Added new filter 'yith_ywgc_gift_card_coupon_message'.
* Dev: added new filter to the formatted price on email and pdf, yith_wcgc_email_template_formatted_price & yith_wcgc_pdf_template_formatted_price
* Dev: added new param to the yith_ywgc_apply_gift_card_discount_before_cart_total hook
* Dev: added new filter ywgc_design_section_customize
* Dev: Added new parameters in a filter and action of gift card template.