Forward hcal and insert can't be visualized properly

### Environment: (where does this bug occur, have you tried other environments)
- Which branch (`main` for latest released): main
- Which revision (`HEAD` for the most recent):
- Any specific OS or system where the issue occurs?
- Any special versions of ROOT or Geant4?

### Steps to reproduce: (give a step by step account of how to trigger the bug)
1. Try to display at the insert geometry geometry

### Expected Result: (what do you expect when you execute the steps above)

### Actual Result: (what do you get when you execute the steps above)

This may have to do with incorrect handling of volume subtraction in TGeo visualizer