[quotation, ecommerce] show details of the carts in the confirmation email template

- Task: https://www.odoo.com/web#id=9421&view_type=form&model=project.task&menu_id=3942&action=327
- Pad: https://pad.odoo.com/p/r.kmI7xByKs7Krvusa
to avoid "read more" inside table in chatter.