Steps :
In a ONE company environment,
\- Go to Project Task list view.
\- Display 'Customer' column.
\- Select multiple records (multi-edit).
\- Click on a 'Customer' cell to display the dropdown list.
Issue :
Traceback : company not found.
Cause :
partner_id's domain refers to company_id,
which is not present in the vue if not in multicompany.
Fix :
Add it in ivisible.
closesodoo/odoo#98913
Signed-off-by: Xavier <xbo@odoo.com>