Allow making Thumbnails a link to the detail page.

Allow turning on "Render As Link To Detail Page" for the Thumbnail field. As it stands, for many pages at least, clicking on a thumbnail only selects the item.

This would be especially nice for the thumbnail view. As it stands now, some other field needs to be added under it and *that* field made into a link to the detail page. But, if that field happens to be empty, it only shows the field name in italics and doesn't work as a link.