Glue the Giant Modular Bus Mixers Updated to 1.1.1

This small update includes some fixes and one new feature. Per an @Aria_Salvatrice request, the Gig Bus Mixer can now have normal sends (not post red master levels only) to the blue and orange buses.

And as always, the Modular Bus Mixers continue to be a powerful way to mix your patches with flexible routing to sends, great live use, audition almost anything (solo with a long press), exponential fade automation with separate in and out speeds, input preamps, polyphonic stereo spread modes, and more. Available now in the VCV Rack Library.