`PoseBone` and `Bone` already have their `struct_path_func` defined, but that was missing from `EditBone`. Since `EditBone` is usually what is visible from the UI (and only later gets flushed to `Bone` via `ED_armature_from_edit`), it makes sense to have complete RNA paths for `EditBone` as well. Enables the usual context menu `Copy Data Path`, `Copy As New Driver`, ... automatically. Pull Request: https://projects.blender.org/blender/blender/pulls/142065