WooCommerce Mix and Match Products 2.7.7

* Update: Tested up to WooCommerce 9.2.0.
* Fix: Remove image link from thumbnail if theme does not support wc-product-gallery-lightbox.
* Fix: Set validation context to cart if $_GET['update-container'] is set. Fixes display of button text in mobile footer plugin when editing in cart.
* Fix: Change form validation context to edit when switching subscriptions.

* Fix: Cart validation error when adding multiples of pack with same configuration.

* New: Introduce styling for Mix and Match products in Receipt Rendering engine.
* Fix: Resolved a fatal error triggered with WooCommerce 9.1, when tracking and legacy Order data storage were enabled.
* Fix: Harden validation of mix and match container that's already in cart.
* Fix: Show placeholder image if child product has no thumbnail.
* Tweak: Slight simplification to add to cart validation error strings( "You have selected too many items" and "You have selected too few items"). Double check your translations for to