Print vlang if present.
Make unselected tracks and editions grey instead of adding (+) before
selected tracks. Mark them with the same circles as show-text
${track-list} and script-message osc-tracklist when not outputting to a
TTY.
Don't print a different symbol with --sub-forced-events-only because
nobody uses this option, and subtitles are very unlikely to mix forced
and non-forced events.
Align 2-digit track IDs.
Align languages of up to 7 characters (the length of zh-Hans).
Leave spaces when a track has no language but at least another track
does to align the following track data with the other tracks.
Add a space between values and their units.
Convert Hz to kHz.
Pretty print FPS and kHz with mp_format_double().
Don't print images' FPS because it's just a bogus value taken from
--mf-fps.
Co-authored-by: Kacper Michajłow <kasper93@gmail.com>
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