We'll create fresh WordPress site with Admin Menu Tree Page View installed. You have 20 minutes to test the plugin after that site we'll be deleted.
The Admin Menu Tree Page View plugin adds a tree-view layout to all your pages – directly accessible in the admin menu. This way, all your content will be available with just one click, no matter where you are in the admin area.
You can also add posts, pages and custom post types directly in the tree and you can quickly find your pages by using the real-time search box.
Works perfectly in WordPress installations with lots of pages in a tree hierarchy.