Fix last login display on initial login

Upon an initial login the following was supposed to be displayed

    Last login: First login

however the following was being displayed

    Last login: First login (UTC) from

The '(UTC) from' came from the template files themselves.

The simplist and probably least confusing thing to do is just not
display anything on the initial login.

Signed-off-by: Andrew Clayton <andrew@dnsandmx.com>