RadioBasedTabs
when clicking a username in the accounts tab, the details comes up with
a copy of the row you clicked, so you can view logs and edit the user.
Also decided not to use a RadioBasedTab here, instead providing a link
to the activity tab with a search for the user (added the ability to do
that, ?user=username). FIXME: handle deleting the user or just generally
editing them.
748acc13c0