Have a visual indicator of steps that are folding and which step stops folding

Query folding is a great feature, but currently it's very hard to quickly identify which steps are being folded and at what step the folding stops (due to a transformation that can't be folded). It would be great if there was a visual indicator on the steps pane, indicating the steps that were folded and the step where folding ended. This would make it much easier for us to quickly shift steps around to optimize what's being folded without having to consciously know that X, Y, and Z prevent further folding.