[RFE] Improve bookcasting interface
variants: put scrolls below spellbooks, create additional command for just spellbooks, quick-mark spellbooks
Problem: Spellbooks are read (for the purpose of bookcasting spells) much more frequently than Scrolls. But in the "read" menu, Scrolls are displayed first, so any scroll you pick up messes up with the keys required to bookcast that Frost Bolt staple spell you constantly rely on. Later on, you have to scroll through a couple of screens full of Scrolls to even reach Book section.
Possible solutions:
*) change ordering: first display Books, next, Scrolls.
*) separate "read" command for spellbooks only. Keeps both variants (learn and cast)
*) separate "bookcast" command for spellbooks only. Automatically only the "cast" option, for learning you have to use the ordinary "read".
**) quick-mark spellbooks for the purpose of bookcasting