List Personal Queue Command

[GMGilson]

With the addition of elevated queues it would be nice to have some way to see if someone is in your elevated queue.

This would also help with debugging issues pertaining to elevated queue.

Proposal:

• /list_queue @self
• Will dm the caller with a message displaying the order of their elevated queue

[stott531]

A couple questions:

1. Do we want to be able to list queues of other instructors? If so, should that be available to admins only or to admins and instructors?
2. Would it be sufficient that just typing /list_queue would just dm the caller's elevated queue to them? In another words, have the sender as the defaulted 2nd argument?