KDE: dnfdragora, not dnfdragora-updater (#1554550)
    
    KDE really only wants the dnfdragora GUI install/remove app, it
    does not want dnfdragora-updater. KDE uses plasma-pk-updates for
    update notification.
    
    Fixes https://bugzilla.redhat.com/show_bug.cgi?id=1554550
    
    Signed-off-by: Adam Williamson <awilliam@redhat.com>