[FIX] account: mandatory ref
[FIX] account: mandatory ref

The field was made mandatory in the form view since the move line name
is no longer required from saas-15 onward. However, some automatic
process might still create moves without name. To avoid blocking the
user, we make this field mandatory only for new moves.

opw-744054

ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo