Is your feature request related to a problem? Please describe.
I have stopped using the scrap button to sell/destroy items marked as junk because I am never sure when scrap is going to permanently destroy something that cannot be recovered.

Describe the solution you'd like
It would be nice to have an optional warning popup before Scrap destroys items that cannot be sold to a vendor.

Describe alternatives you've considered
I do not use auto-scrap at all and use the "auto-sell gray items" feature of another addon to partially mitigate this problem. I try to pay attention to what items Scrap has marked as junk but inventory management often gets a bit overwhelming for me. An optional warning to help prevent permanent item loss would be greatly appreciated.

Additional comments
This would only apply to items destroyed directly from character inventory that cannot normally be sold and do not appear in the buyback list after destruction. Examples may include quest items, caged pets, basically items that vendors do not want.

This would not apply to items falling out of the buyback list as there is already a sufficient option for that.

This could ignore items intentionally added to the per character junk lists as it could be assumed to be an automatic confirmation for items intentionally added by the user.