Allan Diagram: Add option for reduced legend based on fault data in 3D view

Allan Diagram can creates extensive number over overlapping formation zones, making visual inspection for specific juxtapositions difficult.
Add option (default behavior) to only show Legend with formation zones and formation zones combinations from filtered faults.

<img width="1362" height="937" alt="Image" src="https://github.com/user-attachments/assets/c32b42e8-2fd6-49ad-a67d-ee01791554e4" />