Workobject: attach to does not have nested component groups

Snampo Nederland

When I want to attach a part to another part, a dialog box shows where the parts are shown nested or grouped, right side of the picture.
When i want to attach a workobject to a part, a dialog box shows without the nesting/grouping, left side of the picture.

I would like the workobject Attach to dialog to be the same as the part Attach to dialog.

Kind regards,