Previously, when adding a group node it was always called `Group`. This is not particularly useful. Also it's inconsistent with many other places like adding modifiers where the name of the modifier depends on what modifier is added. Now, newly added group node will have the same name as the group that it calls. Node names still have to be unique though, so e.g. `.001` is still added. Pull Request: https://projects.blender.org/blender/blender/pulls/139093