v6.64+dev0719 - July 19 2022
* Includes feature branch: track media/razor edit grouping
* Includes feature branch: pan law/function improvements
* 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
+ Media items: fix flickering when moving media items across tracks and "automatically display affected envelopes" is enabled
+ Razor edits: ignore razor edit areas on envelopes when running action to crossfade media items [p=2579146]
+ Track grouping: improve grouping of razor edits on tracks with different numbers of fixed lanes
# Actions: deselect unaffected items on the not-selected side of the split when running action to split items selecting left or right [p=2578578]
