YITH WooCommerce Badge Management Premium 3.16.0

* Update: plugin framework

* New - support to WooCommerce 3.7 5.2
* New - edit badges through Quick Edit
* Fix - hidden badges on YITH Frontend Manager products section
* Update - plugin framework
* Update - language files

* New - support to WordPress 5.2
* Update - plugin framework
* Tweak - added new CSS class for anchor point position