[Request] Option for /phantomjob to switch to the previous phantom job.

It would be nice to have a `/phantomjob last` command that swaps to the most recent phantom job before changing.

Example use case would be using freelancer to buff or check for chests, then swap back to the job you were on before: 

```
/phantomjob freelancer
/ac "Phantom Action II" <wait.1>
/ac "Phantom Action III" <wait.1>
/phantomjob last
```