Hide or Remove Return Authorization Button in the Sales Order but not in Invoice/Cash Sale

Recommendation:

1. Edit Custom Sales Order Form.
2. Select Actions tab > Standard Actions subtab.
3. Locate Action Name "Authorize Return".
- Set "Show" = False.
4. Click Save.

* This is currently logged under Enhancement # 121561 (Remove Return Authorization Button in the Sales Order but not in Invoice/Cash Sale).