Make sidebar more intuitive, allow pinned, nested rems to remain visible

If you prefer a very nested knowledgebase it’s currently not possible to have the root and and important rem further down the hierarchy in the navtigation bar.

Example:

When I then favorite the root folder “Computer stuff” (which contains Linux) the Linux entry is gone and you have to search is in the nested structure.

For my knowledgebase it means I basically can’t use the sidebar for favorites. Because most of my favorites are nested in one of the main folders, which are sometimes favorites too.

And even that I can’t use, because if you have the root of a highly nested document pinned, it will cause major performance problems on mobile.