Barn2 Media - WooCommerce Bulk Variations 2.3.3

* Fix: Grid not displayin when attribute use Unicode characters (e.g. Hebrew, Chinese, Arabic, etc.)
* Tweak: Added missing filter and gettext function to Price header in vertical single-attribute grids
* Dev: Added filters to allow more custom bulk actions
* Dev: Updated compatibility with WooCommerce 6.3

* Fix: Only first grid works when multiple instances are added to the same page

* Fix: Added two missing parameters in `woocommerce_available_variation` filter