Fix recalculating included tax adjustments. Fixes #4671
Admin::Orders test completed? instead of complete?

Checkout steps are customizable, 'complete' may not be the only state in
which an order is considered complete.

Fixes #4751
added 'through: :stock_items' to 'has_many :stock_movements' relation in variant class

Fixes #4707
Regression spec for variant stock_movements relation
Use current_store.url for Google Analytics.