Much progress with the image wrapper. Popups are working; layout is right; the overview control is in place; zone selection on the image and in the nav panel are now integrated; zone selection on the panel zooms the image; zone selection on the image now expands and focuses the panel item; and selected zones now have their own colours in their outlines. The only core programming thing left is to split out the "showing" status into "showing" and "mousedover". After that there are issues such as abstracting captions and so on.