Clear out unused bloat data that becomes unused after a mix is created

[Instantly Meatified]

Some sequences can cause significant load from data that isn't there anymore, like instruments that weren't used after the creator decides to replace them with another one, or decides to overwrite an entire sequence with something simpler
Optimization should not remove tweaks to instruments like FX or names or colors and should just make it so the sequence becomes cleaner while still keeping the old configurations for if someone wants to go back to an previously cleared out instrument on the canvas and get back to work with them
Buggy sequences that may not load on lower end systems could now be able to load after optimizations have been made