Undo Button

This may only affect a minority of us as I doubt it comes up when using a mouse, but as a touchpad player I would really appreciate an undo button in the shops. I've only had it happen a few times, but just had my finger slip and accidentally sold a Regal Blade that I had JUST finished upgrading. It's particularly brutal on upgrade items since you can't simply find a new one in the shop to restore your build.

Obviously there would need to be restrictions coded in, removing the undo option if the last thing you sold either transforms another item or gives you a random item to avoid save scumming style behaviour, but I think the ability to undo the last item sold would be a nice QOL improvement. Maybe I'm wrong and this happens so rarely to people that it doesn't matter though, curious if other people have been wanting this as well.