Option name duplicate of group model order

**Describe the bug**
See https://github.com/eclipse-elk/elk/issues/1178#issuecomment-3612878286

**Screenshots**

<img width="591" height="214" alt="Image" src="https://github.com/user-attachments/assets/93fff125-c3da-4ca5-ac69-2329bfae85d5" />

**ELK Version**

0.11.0

**Additional context**

I tink the description of some group model order options should be more complex.
