v6.61+dev0613 - June 13 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
+ Envelopes: fix pencil-drawing take envelopes on stretched media items in certain situations [t=267716]
+ Pan: only list deprecated pan mode in pan law dialog if the project already has pan mode set that way
+ Render: fix canceling render queue on user clicking "cancel all" [t=267732]
# Render: apply fade-in/fade-out correctly for all fade shapes
