Implement queue_ui deletion for SystemQueue, tidy up menu callbacks for exposing QueueUI menu options

Jeff Geerling authored Feb 17, 2013 and Ben Jeavons committed Feb 17, 2013

Issue #1177148 by geerlingguy: Fixed Notice: Uninitialized string offset: 0 in form_process_tableselect().

Altered cron definition, beginning new button for ending lease time, batch definitions can set arguments before queue

#700836 process queues via batch
#702604 process queues via cron

Adding queue_ui.pages.inc for form builders and handlers. Working queue deletion process. Batch up next.

First commit of queue_ui Drupal module for viewing and managing queues created by the new Drupal 7 Queue API.