Release VU Meter (ZenoMOD) v1.8.0 (#445)

- Fix needle hold time being significantly shorter than configured
- Fix inconsistent meter readings on transients [p=2923589]
- Extend Calibration Level range to -60 dB [p=2762077]
- Add embedded UI reference level display (show if size permits) [p=2762077]
- Add embedded UI hitbox for reference level drag
- Add embedded UI hitboxes for VU/Peak display reset
- Fix DPI-independent drag speed for GUI sliders
- Fix trackpad scroll speed normalization (hopefully also on macOS!) [p=2767438]
- Redesign L||R Summed Mode: Needle now correctly displays the higher of the two audio channels 
- Add Rise Time & Overshoot abstraction parameters (internally converted to momentum/damping) [p=2921657]
- Replace VU regression curve with analytical function
- Various performance optimizations

Author: ZenoM0D