Products with option "Disable own stock" set cannot be selected as parent product for new product

Hi again :)

If you create a product and select "Disable own stock" the product can not be selected as a parent for other products in the app.
In the web you can still select those products as parents and the app seams to handle those products fine when created in the web.

Thanks for the great work, i know it goes a lot into maintaining such a project as a hobby.