[FIX] mail: notify channel_fetched/channel_seen only when changes

Revision on https://github.com/odoo/odoo/commit/844fb2b51ea7cfa557b19466c0a53dde19433e7a

With the commit above, when the JS notified on `channel_fetched` and
`channel_seen`, it was always writing in DB and sending notifications
on the longpoll.

This is useless if the information on last fetched/seen message
of the conversation remains unchanged, which is what this commit
solves.

Also prevent `channel_fetched` from seding notifications on
the longpoll if this is called on a non-chat channel.

0 files changed, 0 insertions, 0 deletions