[IMP] sale_coupon: make email templates bioutifoul

Purpose of this commit is to enhance quality of templates proposed by Odoo
and make them use notification layout when send by emails. Those emails
are cleaner and more up to date compared to other emails.

Including
  * revamping of coupon email to match current notification guidelines. It
    was using a very strange and different design. We choose to standardize
    it;
  * use the light notification template to encapsulate coupon emails when
    sending them by email;

This commit is related to task ID 51122 (and PR #2060).

0 files changed, 0 insertions, 0 deletions