v6.60+dev0612 - June 12 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 shapes
+ Video: hopefully improve WMF compatibility further
+ Windows: improve appearance of checked bitmap menu items (fades, note head shapes, etc)
# Media item fixed lanes: fix lane play markers being re-selected [p=2568070]
# Media item fixed lanes: fix razor edit preview display issue when top track is scrolled partially out of view [p=2567833]
# Media item fixed lanes: fix razor edit stretch in certain situations with hidden lanes
# Media item fixed lanes: improve behavior when recording to soloed lane with existing media items
# Render: support fractional milliseconds in render fade settings
# macOS: re-fix AVFoundation deadlock issue
