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.
ah, this is why. If the model is set to undefined then the container would pick it up. Yea, I think the model should have the default and then it gets a bit cleaner.