Purpose of this commit is to keep blacklist and optout lists computation
at mailing level and correctly call it in composer. This allow to have
a clearer and more readable code as well as more robust.
Currently it is done by adding this information in context before invoking
the mail composer. It is now correctly done in composer: if a mailing is
linked to the composer, it calls both blacklist and optout lists methods.
LINKS
Task ID-2377974
Community PR odoo/odoo#61467
Thibault Delavallée
4e709ca3b7