webui: update topology graph after raising domain level
    
    When topology graph was shown with domain level == 0, a view describing
    that domain level needs to be at least 1 was shown.
    
    If domain level is raised, this view is then properly replaced by the
    graph when shown again.
    
    https://fedorahosted.org/freeipa/ticket/4286
    
    Reviewed-By: Martin Babinsky <mbabinsk@redhat.com>