Describe the bug
When a pod set/booster has its radius method set to "Center of parent" and the pod set/booster has children, the marker position is incorrect.

To Reproduce

1. Create a new design
2. Add a body tube
3. Add a pod set/booster to the body tube
4. Add a body tube to the pod set/booster
5. Set the radius method of the pod set/booster to "Center of the parent component"
6. Change the radial distance to 0
7. You will see that the marker position is on the bottom of the parent component, instead of in its center

Expected behavior
Pod set/booster marker should be positioned in the centerline of the parent.

Screenshots