* Fix - Wrong out-of-base catalog prices of Bundles with individually-priced items when prices defined incl. tax.
* Fix - When aggregating bundled item weights into the container item, bundled variation weights are ignored when inherited by their parent variable product.
* Tweak - Refactored bundle 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 - Hide "Shipped Individually" option for virtual bundled products.
