Think about timeouts in robot load

The robot can be doing many things e.g. drying, cooling etc. if we ask for a robot load when one of these is happening we should happily just wait for it to finish. However, if we ask for a robot load and it's doing nothing then the timeout should probably be shorter. This is particularly important as we will want to wait on the pin detect so this timeout will be reached on an empty pin if not implemented in a clever way

## Acceptance Criteria
* We discuss with Neil what good timeouts are
* We implement these