I know it's been a long time since you made this video, but it seems you haven't noticed the three icons at the bottom of e.g. Properties, where you can set how it should display them in relation to alphabetically
my understanding is that you can have white mode or light mode in the exact same way we have always had it previous versions. The nice things for having multiple canvas color options is that we can toggle between them. Could be white/black or grey/black, whatever you want.
