This adds the NSRequiresAquaSystemAppearance key to our default Info.plist file which will tell macOS to auto-switch our effectiveAppearance in sync with the OS. The dark mode documentation has been updated to reflect how to opt *out* of this but it is also noted that certain dark mode APIs will not work on Catalina if you opt out.
* Update mojave-dark-mode-guide.md
Add info about dark mode support in electron-builder
* Update mojave-dark-mode-guide.md
* Update mojave-dark-mode-guide.md