v6.44rc4 - January 6 2022
* Includes feature branch: media item normalization
* Includes feature branch: JSFX internals overhaul/cleanup/modernization
* Includes feature branch: Windows very long pathname support
+ FX: fix potential crash with MCP-embedded JSFX and context menus [t=261548]
+ Linux: avoid closing windows via close button when a popup menu is open
