Merchant POS

Invalid date

Feature
- Support customized barcode with membership discount
Enhancement
- Improve order list refresh behavior upon new order notification and cancelation.
- Improve error messages.
- Mute cancelation notification sounds on OPS canceling an order.
Bug Fix
- Add-on prices are only counted once when the item count > 1
- The price in the notification to Consumer App upon checkout doesn't include grocery item's price.