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
* reception acknowledgment template is moved from demo to data to ensure
people have a template to copy and use for their stages;
* improve layout of rating request template;
* use notification layout when sending template-based emails;
* rename the admin spam template so that templates are correctly ordered
when viewing them in list;
This commit is related to task ID 51122 (and PR #24052).
Pratima Gupta
a461eba04c