WooCommerce Composite Products 10.4.0

* 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'.

* Fix - Fixed out-of-base client-side totals calculation in single-product pages when prices are defined including tax.
* Dev - Added 'woocommerce_composites_compatibility_modules' filter for disabling compatibility modules.

* Fix - Wrong out-of-base catalog prices of Composites with individually-priced Components when prices defined incl. tax.
* Fix - Group mode incorrectly modified for all Bundles, even those not grouped by a Composite.
* Fix - When aggregating component weights into the container item, composited variation weights are ignored when inherited by their parent variable product.
* Tweak - Refactored composite validation logic to make it easier to extend. Modified most back-end validation strings along the way -- these are displayed under very rare circumstances.
* Tweak/Important - The visibility of a conditionally hidden component is no longer affected by the state of any components coming after it. This makes the front-end behavior in single-product pages consistent with the back-end validation script, which was commonly failing when the visibility of a component depended on selections in components coming after it (with no possible fix for all uses).