docs: public BasePanel makeSubScreen()
      {
          Record recHeader = this.getHeaderRecord();
          Record recMessageDetail = this.getMainRecord();        
          if (recHeader instanceof Company)   // Profile
              ((ReferenceField)recMessageDetail.getField(MessageDetail.PERSON_ID)).setReferenceRecord(recHeader);   // Make sure this is hooked up
          return new MessageDetailHeaderScreen(null, this, null, ScreenConstants.DONT_DISPLAY_FIELD_DESC, null);
      }