XXL Form View doesn't apply the right max-width (1320px instead of 1140px). This is due to the precedence of the selector for `.o_xxl_form_view` since https://github.com/odoo/odoo/pull/96627. Also this code block applies to both legacy an new FormView instead of only the new one. This commit fixes it by properly targetting the `.o_form_view` with the `.o_xxl_form_view` and restores the previous behavior. closes odoo/odoo#98686 Signed-off-by: Adrien Dieudonné (adr) <adr@odoo.com>