KFL List files is lost during switch between QSE and CE

KFL List files is lost during switch between Quick Set Mode and Configuration Editor.

How to reproduce:
1. Open JavaTest and specify kfls in Configuration Editor in "Specify Known Failures List Files".
2. Answer "No" to "Specify a Known Failure List?"
3. Open Quick Set Mode and tab Known Failures.
4. Switch to Configuration Editor and answer Yes to the question "Specify a Known Failure List?"
5. Click Next. List of files will be lost.