Various ux improvements in the product and contact form views :
Contact :
- hide/reveal fields according to customer/supplier status and
reorganize
- fields moved to stat buttons
- addresses : tooltip and relabelling
Product:
- Fix re-expense policy (dis-)appearance and fields style
* migration to new API
* removed delivery.grid object, has been merged with delivery.carrier
* change view of delivery.carrier (price rules, etc.)
* tests from yml to py
* website : restrict the list of countries for delivery address in the shop