WebDevStudios/Custom-Metaboxes-and-Fields-for-WordPress — pull request #467 by IgorCode (2014-02-25 21:51:22+00:00)
Title: Horizontal image previews for file_list field

Trying to cut down space around image previews by arranging images horizontally instead of vertically.
In situations where user selects a lot of images, vertical preview is not optimal because it wastes a lot of screen real estate.