* fixes Recipients field. Out-of-box this field could be empty.
One can say, that the module do this todo from `addons/mail/static/src/js/chat_manager.js <https://github.com/odoo/odoo/blob/10.0/addons/mail/static/src/js/chat_manager.js#L57>`__
One can say, that the module do this todo from `addons/mail/static/src/js/chat_manager.js <https://github.com/odoo/odoo/blob/11.0/addons/mail/static/src/js/chat_manager.js#L57>`__