It looks very good. However there is a problem with the last version, when there are other additions with objects below. They will look like the next elements of your objects. With a blank line below the set it would probably be better. The list will be longer, but I think it's worth it (or not...).
Possibly a larger space before names would help. Then you could do without coloring the inscriptions, although it probably wouldn't be a bad thing - it's just a pity that other additions are not made this way.
All in all, it would be good if all add-ons could be divided in this way - including stations - so that first bar there was an inactive, empty name, and below the elements with content.