Slightly better handing for GPO users who are not a member of
any projects at the GPO portal; redirect them after login to a page that tells them they have no project membership. We already not giving them any menus, but add back in the right side dropdown that has their login name, but only a logout button. Eventually we want to make it easier for them to promote to real user, but that needs a bit more UI work. I just made a ticket for it, #377.