admin: Add more apps in admin router
admin: Omit activation url for non-local users

Currently, astakos fails when we try to get the activation url for a non
local user. Moreover, we have no reason to show that information, so we
can safely omit it for these users.
admin: Do not fetch outdated IPs

When finding an IP in the IP log, do not try to get its model, since it
might be deleted.
admin: Do not get model of IP from IP log

The IP may have been destroyed in the meantime.
admin: Show IP details URL only when it exists

Show the IP address as hyperlink only when that address has not been
destroyed.
Merge branch 'feature-admin-fix-demo' into feature-admin