customer details
When viewing a sale, it would be great to be able to see the customer details or click through to customer profile - such as phone number and email address, without having to exit the sale screen.
Also adding in if an item has been posted, and even a place to add in tracking details would be great.

Adding a link to customer is easy, this could be added in a future update.
Shipping tracking is going to be added in the next week.