Refactored customer discount and choose discount. They were using the same schema unnecessarily which was leading to confusion.

bookie/src/app/sales/discount/discount-item.ts

@@ -2,15 +2,15 @@ export class DiscountItem {
   id: string;
   name: string;
   discount: number;
-  discountLimit: number;
-  customerDiscount: number;
+  limit: number;
+  customer: number;
 
   public constructor(init?: Partial<DiscountItem>) {
     this.id = '';
     this.name = '';
     this.discount = 0;
-    this.discountLimit = 0;
-    this.customerDiscount = 0;
+    this.limit = 0;
+    this.customer = 0;
     Object.assign(this, init);
   }
 }