Improve compose sequence handling: - Show preedit for compose seqences - Support sequences of up to 20 code points - Warn when ignoring Compose file features - Support compose sequences producing multiple characters - Support hex escapes
https://bugzilla.gnome.org/show_bug.cgi?id=721120
Some functions need to be exported if X11 compose files are loaded. https://bugzilla.gnome.org/show_bug.cgi?id=721120