5.4.9.0

• window-scale 1 does not work correctly in mpv,
  so I've removed support for it and added my own implementation:
  script-message mpv.net window-scale.
• The CS-Script library was replaced with my own C# scripting implementation.
• If a player window border is near to a screen border and the window size
  changes, the player windows sticks to that near screen border location.
  Furthermore, the remember-window-position option remembers a near screen
  border position instead of remembering the window center position.
• Multi monitor fix using different DPI values.
• start-size option has new options, see config editor and manual.
• Improved script-message mpv.net cycle-audio OSD info.
• The logic for finding the config directory has changed, see manual.
• The dotnet script and extension host was a little redesigned, this breaks
  backward compatibility unfortunately, but I can help to fix existing
  open source code. Example scripts and extensions were updated.
• Fix console not working due to incorrect mpv.conf value generated
  (script-opts=console-scale=0).
• Settings are stored in the file settings.xml now instead of the Registry.
• Video rotation support added.
• After using the config editor it's no longer necessary to restart mpv.net.
• Improved input editor theming.