Added option to view Voided bills

bookie/src/app/sales/bill-number/bill-number.component.ts

@@ -45,6 +45,9 @@ export class BillNumberComponent implements OnInit {
         case '2': // No Charge
           billId = 'NC-' + billNumber;
           break;
+        case '8': // Void
+          billId = 'V-' + billNumber;
+          break;
         default:
           throw new Error('Unknown Bill Type');
       }