Issue Summary

Can't reorder queues on a priority group after adding new queues to the group. 

Steps to Reproduce

1. Go to one of the queue sections you have on your project (Queues, Service Requests, Incidents, etc.)
2. Create a new queue.
3. Go to the "Queue settings" page and add that new queue to the "Team Priority" priority group (or another priority group).
4. Go to the "Priority Groups" tab and click on "Manage queues" for the priority group.

Expected Results

You're able to drag and drop queues to the order you want.

Actual Results

You're unable to drag and drop queues. They stay in the same order.

Workaround

You can reorder them by unchecking and checking them again. Whenever you uncheck and check them again, they move to the top of the list.