'Determines the HttpResponse for the add_view stage. It mostly defers to
its superclass implementation but is customized because the User model
has a slightly different workflow.'

def response_add(self, request, obj, post_url_continue='../%s/'):

    if (('_addanother' not in request.POST) and ('_popup' not in request.POST)):
        request.POST['_continue'] = 1
    return super(UserAdmin, self).response_add(request, obj, post_url_continue)
