[Inventory] Availability checker must check that variant was not deleted
Merge pull request #1930 from stloyd/bugfix/inventory_check

[Inventory] Availability checker must check that variant was not deleted
Add basic order edit functionality to backend with extended change logging
Extend product editing history
Fix price display in history logs
Fix problems with history log using wrong IDs
Move design polishing, adding ability to change order state & currency
Make shipped orders immutable
Prepare for order coupon editing, fix order history for immutable orders
Allow adding order items in backend
Update select2 library, add option to find product by name
Initial Contact component.
[Core] Fix promotion bug that was introduced by wrong merge + fix specs
Initial Contact bundle.
Merge pull request #1933 from stloyd/bugfix/promotion_bug

[Core] Fix promotion bug that was introduced by wrong merge + fix specs
Merge pull request #1864 from stloyd/feature/order_edit

Add basic order edit functionality to backend
Add missing parameter for the order update listener
Fix adjustment calls in order form template
[Core] Address zone based price calculator
Initial Behat scenarios for contact topics