Change recovering and reinstall states to match the unready status

Recovering was matching failed (red led) and reinstall was matching
unknown (grey led), but these states are similar to other states that
are in unready (spinner led).
I'm tempted to agree. I think there might be a rationale for having it with shutdown/poweron (which is: wait for crowbar_join to start on boot to make sure that the node can actually be active again), but if we're optimistic, having "reboot" represented by the spinner makes more sense.

Any other opinion?