Can no longer switch baking set modes

Im attaching a project, but you can really reproduce this in any APV ready project.

Steps to reproduce:

1. Update the manifest file to point to your local unity repository.
2. Open the bug scene.
3. Try switching the baking set mode from single scene to baking set.

Actual results:  Mode is still single scene.

Expected results: Mode changes to baking set.

Reproducible with versions: 6000.0.45f1, 6000.1.0b13, 6000.2.0a4, 6000.2.0a8

Not reproducible with versions: 6000.0.44f1, 6000.1.0a2, 6000.1.0b12, 6000.2.0a1 6000.2.0a3