Lightbar confirm/deny Baja mods ported to JS, supporting multi-languages

Really, these should just be loadable modules (not loaded via text.dat
@exec and global variable magic), and merged into a single module, but for
now, this will do.

The old yesnobar.src/bin and noyesbar mods aren't used when these .js files
are in place, unless you have a copy yesnobar/noyesbar.bin in your mods dir.