Fixes emergency shuttle UI and tweaks escape pods

* If the pod is already armed, players will be able to manually begin an escape pod launch once the shuttle has left, even if the countdown has not expired.
* If the shuttle has left early because someone overrode the autopilot, pods will continue to wait out the 3 minutes if no one manually launches them. Once the countdown expires, pods that are armed will launch automatically.
* As before, if the escape shuttle has not yet left, you will have to wait. This ensures that whoever gets to the pod first can't deny others the chance to get to the pod.
* As before, pods that are not armed will not do anything. All pods will arm automatically on emergency evacuations when the shuttle arrives. 
* As before, pods can be armed at any time by emagging the berth controller (the one outside the pod), or by hitting the arm button inside the pod, so you don't need a specific tator item to get away on a pod.