1.6.2a tiny update — Keysight Steam update #396071

Hello! Teeny tiny update (Windows-only) to add a necessary feature for a streamer to achieve a specific implementation. Only two changes: Pulses which are translucent and always fully opaque (that is, 1.00 opacity across opacity-by-velocity and opacity-by-lifetime-1/2) will now be masked in mask mode. While in this mode, they also slightly move downwards over time in order to properly perform transparency sorting. This allows masking of "note object replacement" pulses. Fixed midi transposing breaking test inputs Now, I better get back to Keysight 2 development!