Feature: Added a column called print in bill to the table customer.

This will prevent printing all customer's names and phone numbers in the bill in case of simple walkins.
This is a breaking change as there is schema changes in the database.
It also bolds the customers who are to be printed in the bill in the running tables list.

bookie/src/app/customers/customer-list/customer-list.component.html

@@ -28,6 +28,12 @@
         <mat-cell *matCellDef="let row">{{ row.address }}</mat-cell>
       </ng-container>
 
+      <!-- Print In Bill Column -->
+      <ng-container matColumnDef="printInBill">
+        <mat-header-cell *matHeaderCellDef>Print in Bill</mat-header-cell>
+        <mat-cell *matCellDef="let row">{{ row.printInBill }}</mat-cell>
+      </ng-container>
+
       <!-- Discounts Column -->
       <ng-container matColumnDef="discounts">
         <mat-header-cell *matHeaderCellDef>Discounts</mat-header-cell>