[ADD] doc: support for analytics keys
[FIX] website_sale: remove spurious print
[FIX] website_sale: don't apply the company name as street logic in shipping address
[FIX] website_sale: usability fixes in the checkout/address form

* `disabled` on the country select tag instead of `readonly`
* `create a new address` selected when the user set an invalid shipping
address and must correct it. Else the user was correcting the shipping
address but the option "ship to the same address" was selected.