Unformatted address converted to formatted address on contact editing

[JF-Cozy]

Unformatted address (address with street, pobox, city ... props (see https://docs.cozy.io/en/cozy-doctypes/docs/io.cozy.contacts/) ) are removed after editing a contact. A formatted address is save instead.

Besides, there is no possibility to edit an unformatted address.