GX-Entwicklung

steps to reproduce:

1. Create a product with a stock of 1
2. open an existing order or create a new one
3. click on the edit button in the top right corner of the products box on the order detail page
4. search the product in the search form
5. add product and ensure the quantity is 1 and the "adjust stock by quantity" option is checked
6. delete the product again and ensure "adjust stock by quantity" is activated

Expected result
The product has a stock of 1 after adding and deleting it in an order.

Actual result
The product stock is 0, because deleting does not increase the stock again