Chore: Changed the account_type and voucher_type enum.

The account type enum is not stored in the database as an enum.
The voucher_type enum is now a table in the database.

Feature: Closing stock can now be saved and in each department.

overlord/src/app/purchase/purchase.component.ts

@@ -100,6 +100,7 @@ export class PurchaseComponent implements OnInit, AfterViewInit, OnDestroy {
           ? observableOf([])
           : this.productSer.autocomplete(
               x,
+              true,
               false,
               true,
               moment(this.form.value.date).format('DD-MMM-YYYY'),