sort users alphebetically in adminuser

[dmorton]

Chris Paul writes:

Currently if an administrator has the ability to administer 
multiple domains and does a search on "*" users, the resulting 
display sorts by domain first, then user. I would like 
to request that this sort by user, and ignore domain.

I think this is related to #487, and probably is just a few ksorts away.

[dmorton]

[1205]