Customization Manager fails when viewing routing that has new queues
Steps to Reproduce:
1. Open Customization Manager and view the Queues tab & Routing tab. Leave this instance open.
2. Open another instance of Customization Manager to add a new queue and a routing rule that uses the new queue. This step can also be done by adding the records directly in SQL.
3. In the Customization Manager instance from step 1, switch back to the Routing tab and the error will appear since the new queue is not known.