No more modal because it's not visible and less handy. Use same behavior as sales order portal. Adapt the invoice style to properly adapt and align with the chatter block. Part of task-37264 closes odoo/odoo#34360 Signed-off-by: Quentin Smetz (qsm) <qsm@odoo.com> Co-authored-by: Pratima Gupta <pgu@odoo.com> Co-authored-by: Sébastien Theys <seb@odoo.com>