WooCommerce Composite Products 10.1.3

* Fix - Sticky add-to-cart button behavior in Storefront 2.3+ when 'Form location' is 'After summary'.
* Tweak - Improved integration with Storefront 2.3.
* Tweak - Improved Summary widget styles in Fixed display mode.
* Tweak - Added back extension template overrides in WooCommerce System Report.

* Fix - WooCommerce Subscriptions: Paying for failed initial/parent order with composited subscription products creates new order and subscription.
* Tweak - Composite container & child cart line item subtotals are now aggregated as displayed.
* Tweak - Speed up removing/restoring Composites in the cart by using 'woocommerce_remove_cart_item' and 'woocommerce_restore_cart_item' instead of 'woocommerce_cart_item_removed' and 'woocommerce_cart_item_restored'.

* Fix - Domain mismatch of string "You cannot add another [...]".
* Fix - 'Masked' matching condition modifier in Scenarios does not work correctly if products were selected before choosing the "Masked" option.
* Fix - Issues with thumbnails' visibility in Composite Products when Jetpack's "Lazy Load Images" module is active.
* Fix - Non-numeric value warnings triggered by 'WC_Product_Composite' under some unusual circumstances when running PHP >= 7.1.
* Fix - Support 'Custom Price Field' inputs in WooCommerce Product Add-Ons.
* Tweak - Improved compatibility with 'WooCommerce Print Invoices and Packing Lists'.