Reviving the request for Hide Unused Tracks

Pretty please? With sugar on top???

With 64-bit becoming more and more common place, we now have the ability to load more and more. While some people will still work in and with small projects, others’ projects will continue to get bigger and bigger. Hide Unused Tracks will make things so much easier, especially for those of us with large templates. I could go in to the advantages of this, but I think they are obvious.

Please consider finally implementing this, thank you.