Forward port fixes done in stable versions and not correclty forward ported into master at merge time. ORIGINAL COMMIT Purpose ======= Before, by default, if a user create a channel, he will not be member of this channel. After, the current user will always be member of the new channel. LINKS Task ID-2421795 COM PR odoo/odoo#63677 X-Original-commit odoo/odoo@eda542c82f X-Original-Task ID-1963414 X-original-commit: 1d5d7871d72c8b747ab2e1b3597f6b8b8e371b26