0-100% slider controls for compositing tag items

It would really be practical, having a 0-100% slider control for every item in the compositing tag (camera visibility, shadows, GI, refraction and reflection) instead of the on/off button.

Something should be said about the camera visibility though. It should make the object transparent as it will be rendered, and not making materials transparent so the inside of the back is also rendered (while darkening overlapping stuff). This could then be used to render a tree or person less visible/transparent without backculling.

Lastly, allowing keyframing for every option remains also essential.

Thanks for your consideration!