After this commit
* the SMS button is visible next to a phone number in mass_mailing, and
mass_mailing_sms
* when sending an sms to a single contact, its phone number is now an
editable field in the wizard and there is a warning if the number is
invalid;
* if operator updated the recipient number, update record number according
to the new number only in single recipient mode (aka, solving number
issues directly from interface);
LINKS
Task ID 2088303
Community PR odoo/odoo#40482
Upgrade PR odoo/upgrade#873
Co-Authored-By: Florimond Husquinet <fhu@odoo.com>
Co-Authored-By: Thibault Delavallée <tde@odoo.com>
