Feature Request: add gray and grayBright colors for light mode browser console

[Sector6759]

Please add "gray" and "grayBright" colors as it's currently impossible to read the "white" and "whiteBright" colored texts in a light mode browser console.

Currently the only option to have a proper experience in light mode browser consoles is to remove all "white", "whiteBright", "bgWhite", "bgWhiteBright" strings when setting the prettyLogStyles property inside the settings object constructor argument.