Allow partner to unfollow a document from a follow up email of that document
through an unsubscribe URL in the email even if not connected.
It works for internal user for follow up on any document and for any partner on
follow up of document tagged as authorizing being unfollowed by any partner (
slide.channel and slide.slide).
Technical note:
The unfollow block is rendered in mail_thread and updated for each recipient in
mail_mail. We don't render it in mail_mail because we don't have the language
of the message at that point.
Depending on the partner and the related document, the unfollow block is:
- either removed if the user cannot unfollow the document (for example if it
doesn't follow it)
- or updated with partner and document information + a security token
Task-3061864
Part-of: odoo/odoo#107978
Pierre-Yves Dufays
3e57dc295c