give the box a class so that it’s styleable

also I’d love an option not to show the list at all in frontend – i would use it only for unattaching in the backend.
A zip-all-attachments download would be nice.
And as mentioned, images in the list should be shown as thumbnails.

Also there is a bug – when I edit the post and then try to unattach, it wants to reload and leave the post unsaved. Ajax would suit better.