[suggerimento ficiur] [feature req] [not compelling but would be nice if] In Frenfbooks management, when creating a new frenfbook from zero, a "select all feeds from all users" button would be nice, or even a "duplicate frenfbook" in frenfbook creation page, so removing unwantend content from some copy of existing frenfbook, or "adding all and then removing a few" instead of selecting all the preferred content would be much more easier and quicker.
