I could do that, but I'm not sure how useful it would be. You can already drag a file to the 'Browse...' file input.

Edit: I see... You mean dragging an image from another tab. I would have to check if this would be doable. Thanks.

Edit2: I think dragging an image from another tab would cause the popup to close anyway. I don't think there are many use cases for this feature so I won't be adding it. Unless you have some good examples where it's useful.