Empty lanes when using stacked groups are not highlighted

In TL2, empty lanes contain the following text:

This indication is useful because it can highlight a missing relationship of some sort.

I presume this has been removed (or forgotten). Could it be reinstated, please?

Hi Marc,
I recall there may have been a technical reason for their exclusion.

The MacOS libraries we are using for display had an issue that meant those items could be a little bit jumpy during scrolling, and the visual distraction that caused was worse than the issue they were attempting to solve.

Perhaps we could instead address it another way, by fading the header text of the empty groups, or even adding “(empty)” alongside the name. That would give the same feedback while avoiding the other issue.