Results are not updated unless the camera has rendered

Steps to reproduce:

1. Open Rendering Debugger
2. Open Volume
3. Select a Camera that is not rendering and a component from a global scene volume
4. Select a parameter in the volume component, change it,
5. Result is not updated when the parameter is changed, only the column in the scene parameter.

See attached video : [Internal link]

Actual results: 

Parameter in the Result Column is not updated unless the camera is being rendered

Expected results: 

This is a limitation in the Volume debugger, but it should notify that the values might not be updated unless the camera renders.

Reproducible with versions: 6000.1, 7000.0