[Feature request] Handling barcodes

[DorKeinath]

For in-person point of sales it could be nice to have another option in the "Receive"-Tap: the possibility to scan a barcode. After taking a picture of the barcode the amount of the product an its description is filled in automatically and a payment request respectively a qr-code is generated. Certainly this needs an option to gather and edit barcodes an its related data (price, description). (For the description it's possible to get data on the web.)