This is a request for testing.
This week I changed "rename" of a hierarchical column node to rename it and all its children. You can do this using a right-click "rename" command (text) or using drag & drop. I also changed right-click "delete" to remove the target node and all its children. These changes provide several long-requested features for managing a hierarchy.
I spent a long time testing but I know from experience that there are ways of doing things that I never think of. Thus this request. As said in the title, if you run from source and use hierarchical columns, give these functions a try.