Admin per domain

==== Required information ====
- iRedMail version:  0.9.0
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): MySQL
- Linux/BSD distribution name and version:  CentOS 7
- Related log if you're reporting an issue:
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Is it possible to allow a specific user to admin a specific domain in iRedAdmin?
At the moment I just see "Global Admin" flag on the user page, which allow the user to manage every domain configured in iRedMail.

Thanks.