v6.28+dev0423 - April 23 2021
* Includes feature branch: razor envelope editing
* Includes feature branch: EEL2 x86_64/SSE
* Includes feature branch: VST3 bridging
* Includes feature branch: ReaSurroundPan
* Includes feature branch: media item lanes
+ Media explorer: refresh display after resetting column order to default
+ Media explorer: support adding additional metadata display columns
+ Video: improve default ordering of 2x2 matrix preset [t=252286]
+ Windows: ignore alt-key mouseup when using alt+mousewheel [t=251477]
