REGRESSION: Prior Status setting has no effect on test tree update

After fix of 6788128 (jt 4.2.1 b10) choosing Prior Status in Current Configuration filter stopped functioning. To reproduce the bug:

- Start JT
- Open TS and any config
- Click "Edit standard configuration values"
- Select "Prior Status" tab
- Check "Select tests that match"
- Check any boxes below
- Click Done
- Select "Current Configuration" view filter

The set of availble tests hasn't changed...