silverstripe/sapphire — pull request #696 by jakr (2012-08-05 12:40:50+00:00)
Title: Add thumbnails to the attach image dialog (Trac 7738).

This is the change that I proposed in http://open.silverstripe.org/ticket/7738. The question is, if it would be smarter to add the summary_fields to File instead and include the information that AssetAdmin requires (see the trac ticket).