ask user to open URL manually because of Bodhi bug
    
    Because of [1] we can't add a comment from f-e-k. Until it is resolved,
    ask the user to open the URL manually. This is very suboptimal, but it's
    still better than be completely broken - at least the user is able to
    figure out *which* updates he/she can comment on.
    
    [1] https://github.com/fedora-infra/bodhi/issues/3298