[FIX] web: Avoid variable name confusion
[FIX] web: Avoid variable name confusion

The attribute `self._fields` is not well named. This is not a list of instances
of the Field class.
It is a list of field names to export.
e.g. 'journal_id', 'account_id/name'

X-original-commit: 6225ce60082d5d2b5fec0e678fe2a1f3f9b93668

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