Don't know if this has been suggested before, but I think it would be helpful to be able to collapse everything under the main headings all at once - which would help reduce the scrolling necessary.
I realize that this can be done manually - for example, for each book of the Bible, you can click on a book to expand or collapse it. But, there are many times when it would be helpful to collapse all book chapters back to the book level all at once - to sort of just reset the sidebar to where it was when a resource is opened.
