Adding close queue functionality
Hide 'Queue me' button if queue is not active
Add check and throw exception if post is sent to join closed queue.
Change from ng-if to ng-show as I saw we had used that before.
Add 'Open' button which is shown if queue closed.
Add functionality for re-opening a closed queue.
Change type of exception
Remove unnecessary imports
Change to NotFoundException
Change auth divs, add method to fetch active queues, add queue column annotation
Change to ForbiddenException