web broswer tab name shows webmin server instead of virtual server

hi guys, just wondering if this is something i have done wrong, or if it cannot be altered.

When i log into usermin

Ie https:domain.com:20000

my desktop pc is displaying the webmin server information in the broswer tab...ie Mail - Usermin 1.751 on server3.hostname.fqdn.

I dont want it to display the server hostname.fqdn, i woud prefer that it only showed the current virtualmin virtual server domain name (ie Mail- Usermin at mydomain.com)

How can i change this?

kind regards, Adam