[IMP] mail: reduce message_post query count and clean code

Purpose of this commit is to improve performance of post and notify through
various code improvements.

Containing
  * making of _notify_customize_recipients a mail.thread method;
  * _message_auto_subscribe_followers optimized;
  * renaming and optimisation of _notify_partners;
  * message_post_attachements optization;
  * remove unused mail_post_autofollow_partner_ids context key;
  * minimize message create queries;
  * only check record related access right for thread messages not in pending
    moderation;
  * get attachements from values instead of db;
  * storing lang in ctx from the beginning;
  * don't track on write on attachments;

Related to task 1943901
Linked to PR #32404

1 files changed, 2 insertions, 2 deletions

diff --git a/addons/website_blog/models/website_blog.py b/addons/website_blog/models/website_blog.py
index 12676691977..6ddb0cb06a6 100644
--- a/addons/website_blog/models/website_blog.py
+++ b/addons/website_blog/models/website_blog.py
@@ -259,14 +259,14 @@ class BlogPost(models.Model):
         return groups
 
     @api.multi
-    def _notify_customize_recipients(self, message, msg_vals, recipients_vals):
+    def _notify_customize_recipients(self, message, msg_vals):
         """ Override to avoid keeping all notified recipients of a comment.
         We avoid tracking needaction on post comments. Only emails should be
         sufficient. """
         msg_type = msg_vals.get('message_type') or message.message_type
         if msg_type == 'comment':
             return {'needaction_partner_ids': []}
-        return {}
+        return super(BlogPost, self)._notify_customize_recipients(message, msg_vals)
 
     def _default_website_meta(self):
         res = super(BlogPost, self)._default_website_meta()