Revises/fixes number of ecommerce issues: changed tax class/zone management to move country/region into zone definition, better management of non-US zones; better application of 'products per row' now using a 'number' control for entry since only 1-6 are valid; fixes add/edit region which had regression bug of adding new country; better history flow with address & tax management screens (aren't always sent back to main page now)
Fixes a number of issues related to ecommerce taxes; now manage tax rates based on tax class and tax zone allowing a single tax class with multiple zone/rates