Instrument editor keyboard live updates when playing [the keyboard or when a song is playing].  Adjustments to view creation to remove more hacks around PreCreateWindow and OnCreate. Generally becoming less hacky as time goes on...
Controls added to VRC7 instrument dialog.
Fixing window rect functions. Instrument panes now in right place.
Instrument dialog looks better.
Hooking up VRC7 instrument editor controls. Block signals from controls when value is programmatically changed. Remove obsolete file.