We have built a gallery in Perch using figureGallery. We can reorder the images using the <reorder> tab but it only shows us a list of numbered items (item 1, item2, etc.). We need this in thumbnail form, in other words, a graphical interface (list) where admin can drag the thumbnails intuitively to reorder the on-page display (we are using a masonry-type UI linked to a full-screen lightbox).
We are not married to figureGallery and remain open to any solution. The simplest one seems to be to add thumbnail images to the reorder list.