1. channel mention should work for channels, chats, and groups, even if
there is a group restriction for the channel.
2. channel mention in livechat is disabled because the visitor can't get
access to the channel.
3. remove the fetch and search for channel mentions in livechat so that
there is no extra rpc call for unuseful data.
4. add a test for the channel mention in thread.
closesodoo/odoo#155380
Signed-off-by: Alexandre Kühn (aku) <aku@odoo.com>
zel-odoo
aa87b65dc8