Add notification screen when orders are cancelled due to counterparty inactivity #535
Description
When an order is cancelled due to counterparty inactivity while in states such as:
waiting_buyer_invoice, waiting_payment
The app currently shows a SnackBar message informing the user that the order was cancelled. However, this event does not appear in the notifications screen (the screen accessed through the bell icon). Because of this, the user briefly sees the SnackBar but cannot later review what happened to the order.
If a user is the taker, completes their step, but the maker does not continue, the order is eventually cancelled.
The taker should receive a notification in the notifications screen indicating that the order was cancelled.
Example message:
The seller did not continue the order. The order has been cancelled.