Fix: Save/Update voucher - timedelta was days instead of minutes

Fix: Product list for sale was sending product_version_id instead of version_id this was borking on products with multiple versions
Change: Update Product Prices initially does not show list. Only the date and Menu Category List

bookie/src/app/core/menu-category.ts

@@ -10,4 +10,8 @@ export class MenuCategory {
   sortOrder: number;
   products: Product[];
   enabled?: boolean;
+
+  public constructor(init?: Partial<MenuCategory>) {
+    Object.assign(this, init);
+  }
 }