New row is added after order status changes

[Suleman-Elahi]

Right now when the product status changes, it adds a new row in the sheet. Ideally, it shouldn't do that. Either it should change the status in the same row or delete the previous row. It will help in having no redundant data. I've kind of fixed this locally. See if you add the change in the script or I can do a PR.

Suggestion: Move the configuration fields in a separate Sheet, say "Config". And download the orders in a separate sheet say "Orders". It will be much easier to manage the orders' data.