Comment 7 for bug 1650663

Okay, I finally got it. If /api/clusters/{cluster_id}/attributes/deployed returns an empty hash (which is ok, because there has not been a single successful deployment yet), then Deployed Changes button is not shown. I am pretty sure that if have empty deployed hash, then this would mean that we have not deployed anything yet and 'Deploy Changes' button should be shown. Thus I will reassign this bug to fuel-ui team