Subfolders for Links

Please add subfolders for links and the option to make a "link" without including a link. This would make it like a parent folder that doesn't go anywhere but still has its own edit window for a description and pictures.

For example:

I now have Books Semester 1 and Books Semester 2 as two different groups. I would like to have one group for Books, with placeholder links (that don't take you anywhere, but do take you to the edit window) for Semester 1 and Semester 2. Then have indented link buttons (sub-links) for each book in each semester. It would also be nice to see these sub-links in the edit window below the description box. This would be too much with many subfolder levels, so just 1 level down would be all that is needed and would help so much in my organization!

I did my best to show this in MS Paint with a basic example for my TCM class. To the left of the red line is how I have to make it currently, and to the right of the red line is the change I would like to see. I had to add a link to make this example work but the idea would be to not need a link for the parent folder (Semester 1 in this example).