Integration with Fabrikar tables

I am waiting for the point two of your post #12990...

Aha.
OK. Now I'll think of hierarchy of categories.I think it is not too hard, but some options have to be analysed. For example, where to stop.
I mean
- root cat
1 - cat1 root
1.1 - cat1
1.1.1 - subcat1
1.1.1.1 - subsubcat1
1.1.1.2 - subsubcat2

When stop
1 - subcat1 and display or not it
2 - cat1 and display or not it
3 - cat1 root and display or not it
4 - root cat and display or not it

I would say no stop. Everybody will decide for himself how many categories one wants by setting the categories.tree.
In group options you only specify:
1. Show category and title - category, all subcategories and title will be displayed
2. Show title - you display title only

I did new release.
zhuk.cc/2020/02/21/zh-openstreetmap-grou...h-parent-categories/

You can build category hierarchy

Great!
Sorry, but I do not know where to activate it. I cannot find the Category Hierarchy List anywhere.

OK, found it. Created a new override. Did not do anything there except setting category level. Returned to the map with my groups and selected the override in the advanced options. Nothing happened, the list is still without the category list.