Feature: Exit guard if bill is dirty is sales to prevent accidentally backing out of a bill with data.

bookie/src/app/sales/pax/pax.component.ts

@@ -28,7 +28,7 @@ export class PaxComponent implements OnInit {
   }
 
   accept(): void {
-    const { pax } = this.form.value;
+    const pax = +this.form.value.pax;
     this.dialogRef.close(pax);
   }
 }