WooCommerce Composite Products 10.4.0

* Fix - Unable to import Shipstation orders that contain deleted products.
* Fix - Incorrect relative price calculation when the chosen Component Option quantity is > 1.
* Fix - "Invalid form control not focusable" error when clicking the add-to-cart button of Composites containing hidden Components with required Add-Ons.
* Fix - Round individual Component prices when calculating catalog prices and container cart/order item prices/subtotals.
* Fix - Potential fatal error when attempting to add a Sold-Individually product to the cart with another one already present.
* Tweak - Respect default toggle-box Component state when initializing app.
* Tweak - Added 'woocommerce_editing_composite_in_order' action, triggered after editing a Composite product in an order. Useful for porting over old item meta.

* Feature - NUX improvements.
* Tweak - Updated FontAwesome icon fonts.
* Fix - Added support for Product Add-Ons v3.
* Fix - Disable scroll anchoring to prevent content jumps in Chrome.
* Fix - Default Option search not returning results correctly when Component Options are added by category.

* Fix - Configure/Edit Composites in Subscriptions.
* Fix - Unable to re-purchase orders that contain Composites via 'My Account > Orders > View > Order Again' under WC 3.5+.
* Fix - Prevent PHP execution timeouts due to duplicate WC_Product::save() calls when saving Composites with 'Catalog Price' set to 'Calculate From/To'.
* Tweak - Moved "Sold Individually" logic into 'woocommerce_add_to_cart_sold_individually_found_in_cart' callback (WC 3.5+ only).
* Fix - Added REST API v3 support.
* Fix - 'Undefined type' REST API v2 warning when using the 'composite_components' property 'quantity_max' field.