Image Preview in overview #7492

I've searched the issues but didn't find any request for it (maybe I have the wrong wording... as I can't believe, that nobody else request it before):

It would be awesome if we could see an "Image" in the Card-Listing.
To archive this, there could be "checkboxes" (or better Radio-Boxes) if an Attachment is an Image... which allow to use it as Preview-Image in the Card-Listing