Can't tell when someone was last active in Launchpad

[Matthew Paul Thomas]

It would be handy if you could tell, from someone's Launchpad profile page, when they last did anything in Launchpad.

For example, it would help in telling whether someone was on holiday, or in distinguishing between an active contributor and an inactive contributor with the same name.

Giving the date of the person's most recent login would not be sufficient, because Launchpad sessions are persistent.

[Originally suggested by Shirish Agarwal in launchpad-users@.]