Try double-clicking the column header. That works for me. I'm on E10.
Actually, it's more like clicking the header twice instead of a classic double-click. It doesn't seem to matter how much time you wait between clicks. Once you've gotten the columns to sort, you can keep clicking the header to toggle between ascending, descending, and "back to the way it was before you starting sorting". I've never seen a list do the third option, but I think it might be quite useful.