Enhance user account admin
Enhance user account admin

Current user account admin view displays base information.
Registration admin view is limited to user and activation status,
without filters.

This change enhances user account admin view, to display activation
status and date of join plus last login.
Additionally it enables to resend activation email.

christophmeissner/volunteer_planner,christophmeissner/volunteer_planner,pitpalme/volunteer_planner,coders4help/volunteer_planner,pitpalme/volunteer_planner,pitpalme/volunteer_planner,christophmeissner/volunteer_planner,coders4help/volunteer_planner,volunteer-planner/volunteer_planner,volunteer-planner/volunteer_planner,christophmeissner/volunteer_planner,coders4help/volunteer_planner,coders4help/volunteer_planner,pitpalme/volunteer_planner,volunteer-planner/volunteer_planner,volunteer-planner/volunteer_planner