As you may know, shelves were an antiquated design and we've decided to discontinue them in favor of a much more flexible module arrangements which would never be possible or work with shelves. However, this feature is often requested and our developers already working on a similar functionality!
Please feel free to write us back and we will be happy to assist you.
I really meant that I need a Shelf module as exists in PF7–there one can dump a bunch of links to files and folders that are say needed for a particular project to a “shelf”. This particular module is not available in PF8 and makes the product unusable for me.
BTW, while I am not against your module idea it seems like a solution in search of a problem. I would have thought most people configure PF the way they want to see it and rarely if ever change the layout (perhaps except to hide a sidebar on a small portable screen). Just would like to set up the various areas once and be done. However, for me at least, one of those sidebar areas should be a shelf where I can put a bunch of file/folder pointers (the “shelf module” from PF7). I currently have a couple of those on right for two projects.