* Misc-Add support for PHP 8

* Tweak-Improved PHP 8 support.
* Tweak-Replaced deprecated jQuery functionality.
* Tweak-Added call-to-action button to the ‘New subscription widget’ admin notice.
* Tweak-Added compatibility with WC 4.8.
* Tweak-Added compatibility with WP 5.6.

* Misc-Add support for PHP 8

* Misc-Add PHP 8 Support

* Fix-Select button alignment in ‘Options Style > Thumbnail’ grids.

* Fix-Dev-Fix unit testin infrastructure.
* Fix-Dev-Remove default value from optional parameters that are followed by required parameters in functions/methods, since those are de-facto required and trigger a deprectation notice in PHP 8.
* Fix-Dev-Set PHP version to 7.2 in composer.json for compatibility with PHP 8.
* Tweak-WC 4.7 compatibility.
* Tweak-WP 5.5 compatibility.

* Fix-Add plugin page to new WooCommerce Navigation.
* Tweak-WC 4.7 compatibility.
* Tweak-WP 5.6 compatibility.

* Fix: Rebuild minified script.

* New: WooCommerce 4.6.2, 4.7.1 compatible
* Developer: Filter ‘chained_products_show_for_variable’
* Update: POT file

* Tweak-Improved PHP 8 support.
* Tweak-Tested compatibility with WC 4.8.
* Tweak-Tested compatibility with WP 5.6.