'How to uncheck suggested recipients for message ODOO 14?

In odoo 14 when I open an opportunity and I press the button "New Message", the customer from that opportunity appears as a receiver of the message by default.

enter image description here

Is there a way to make by default the checkbox not checked for the customer here?

I found this solution for odoo 10 (Solution), but it doesn't work for odoo 14.



Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution Source