Grouping pages in admin

Would like to have a way to group or at least sort pages. I don’t want to use tags, as such a tag might be used for only five pages, and just clutters up my already-too-long list of tags.

The ideal would be a hierarchical structure like Wordpress uses for pages, where I can set one page as the “parent” and the other pages as “children.” Then have this be usable in the list of pages, so I could expand and contract each group.

Yesterday, I worked on such a set of pages (our “Election Central” section), and after finding each page I needed, I changed its publication date to two days ago, so they would all show up at the top of the pages list (since it sorts by publication date). This seems like a kludge, so I thought I’d post an Idea about a page hierarchy. Thanks!