Add audio track button selection in interface

[NTag]

Hello,

It would be great to have a button in the user-interface to select the audio track, like for subtitles.

Thank you very much for what you do,
Basile

[jaruba]

Is this really needed? I feel like you could just use the API to make a right click context menu for audio track selection.

[jaruba]

That's how I do it in Powder Player at least, as audio track selection is usually rare for videos.