Ability to add folder in sidebar without making a page

Currently, if you want to organize the sidebar into sub folders, you have to create a page. In my setup, this leads to dozens of blank pages that only have a title as I have lots of nested data for different projects and departments.

I would be nice to be able to make a "folder" without having to have a page attached to it. When clicking on it, its only behavior would be to expand or collapse the group instead of change the page.