Display track in multiple categories

[ghost]

It would be nice to be able to display a single track in multiple categories in the hierarchical track selector. Currently to do this, the track has to basically be duplicated in JBrowse (but can still point to a single file). This duplication means that you can turn the track on twice, instead of once.

So the ideal situation would be to allow the trackList.json file to accept multiple categories, and the same track is placed in both. When a user clicks on the track in 1 category, it shows it ticked in the others.