[IMP] crm: add utm fields in tree view
[IMP] crm: add utm fields in tree view

The purpose is to allow the user to choose if he want to display or not
information about the campaign, the source and the medium. This field
are now available as optional field for the tree views of opportunity
and leads.

task-2189667
ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo