Recently I started updating the page list for Index:Landmarks of Rensselaer County - Anderson - 1897.djvu on English Wikisource.
However, when I add a new page description for a page number, the tool rather than updating the pagelist, sits there for an extended period without the pagelist re-appearing or updating.
Given that a number of works on Wikisource may contain pagelists with a number of individually defined pages (typically images), the inability of the visual mode to cope with large pagelists is a limitation.
What is desired:
An update to the 'visual mode' that will allow it to appropriately cope with large page-lists, with an acceptable response time.