[FIX] web: limit autocomplete dropdowns width
[FIX] web: limit autocomplete dropdowns width

When the content of an autocomplete dropdown (e.g. many2one field)
was long, the dropdown could overflow the page. For instance, this
was the case of the intrastat_id many2one.

Task 2068261
ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo