Brave Theme capabilities extension

Brave for macOS supports Light to Dark theming but only offers to set one custom theme that get’s impacted when the user or the system switches from Light to Dark mode or Standard to Private or Private with Tor. Suggest to implement the option to set the Light and Dark custom theme separately. Also notify the user the Private or Private with Tor modes are not customizable.
Please see screenshot below for further details.

Thanks for considering. Best regards.