Internal page to link interface

I’d like the ability to find an internal page to link by having the drop down show me pages via an expandable/collapsable section view.

Rather than showing me a list of all pages, present the current drop down similar to the left hand Page navigation where I can expand/collapse sections to expose and minimize the pages within a section where there sections.

With a site with a large number of pages (as with a mature blog site), finding an internal page to link becomes much faster.

Thank you for considering this request.