PURPOSE
Get rid of email / phone behavior on lead that is hard to understand: if
and contact is set fields are readonly, if not they are editable.
SPECIFICATIONS
We want to be able to edit them if a partner is set. If we write on the
email/phone of the lead, it should write on the partner (and vice-versa).
Even a Falsy value is propagated to the customer. Reason is that if you update
a contact information, it should be available for all other records. Setting
a void value probably means you want to stop contacting this contact. This is
now also propagated.
SIDE NOTE: MOBILE FIELD
Mobile field is a bit different. Main phone contact field is phone, and is
placed in the main contact section of the lead view. Mobile is under a more
technical / detailled tab and is not completely synchronized with the partner.
Like zip, city or country, changing partner updates lead information but
changing lead values does not propagate those to the customer. Those fields
can be used for deal-specific information if needed.
Statistics: 5k crm.lead use mobile for 80k active records which means it is
a "lesser field".
LINKS
Task ID 2207636
PR odoo/odoo#48395
Upgrade PR odoo/upgrade#1025
std-odoo
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