First: is this a bug report? A suggestion? Or asking for help?
# Problem description
If possible code, or pseudo-code to reproduce the problem / present an idea.
# Environment
* Operating system: linux distribution, windows, macOS, ...
* Backend used: ncurses (the default one), pancurses, termion, ...
* If using ncurses on linux, ncurses version? (run `grep "define NCURSES_VERSION " /usr/include/curses.h`)
* Current locale (run `locale` in a terminal).
* Cursive version (from crates.io, from git, ...)