Add in-progress commit status change indicator

When deploying a changeset there is a time between when the ecs sends the command and juju ack's it. This time can be quite large on large deployments and on slow environments. This now changes the blue circle in the machine view to a yellow one until the juju ack.
I'd love a comment here on what this is doing. If we found a model list, and we can find the right model. We revive it and do what?