v6.60+dev0611 - June 11 2022
* Includes feature branch: various drawing integer overflow fixes with non-sensical values [t=267310]
* Includes feature branch: fixed lane play markers
* Includes feature branch: improve experimental silent-track CPU reduction option to include FX tail length
* Includes feature branch: media item fixed lanes
* Includes feature branch: internal pin management overhaul for future extension
+ Render: support fade-in/fade-out
# Render: preserve brickwall setting with render preset even if not enabled
# macOS: improve AVFoundation deadlock fix for another corner case
