WooCommerce Checkout Add-Ons 2.7.3

Download WooCommerce Checkout Add-Ons 2.7.3 from nulled fire. Highlight relevant products, offers like free shipping and other up-sells during checkout.
* Misc - Harden some SQL usages
* Misc - Remove legacy woo-includes functions
* Fix - Properly handle required checkboxes validation at checkout
* Tweak - Sort add on fees in order review and emails by custom sort order set in admin, after other fees
* Fix - Address some user interface bug with text area and enhanced dropdown fields at checkout