Description of problem:
Can't edit a raw queue once you've created it -- you get a traceback.

Version-Release number of selected component (if applicable):
0.7.24-1

How reproducible:
100%

Steps to Reproduce:
1. Create a new queue and select Generic as the make, then Raw as the model.
2. Click on the new queue in the main window.
  
Actual results:
Traceback.

Expected results:
Should allow you to edit it.