Put desktop_terminal back the way it was
    
    OK, looked into it some more and ultimately we had problems here
    because of https://bugzilla.redhat.com/show_bug.cgi?id=1908791
    in fact. The password prompt was taking far longer than usual to
    appear because pam_fprintd was failing because of that bug. That
    should be fixed with next Firefox build, so I think it's best to
    just leave this as it was, because in the usual course of events
    it works fine and it saves having another needle to maintain.
    
    Signed-off-by: Adam Williamson <awilliam@redhat.com>