Dark mode in Asset previews (Campaign Editing)

Given ~80% of users have dark mode enabled on their mobile devices, I believe it would be a useful feature to enable dark mode on our previews when creating/editing campaigns.

If you feel that you would gain from this solution, please feel free to vote on this idea. We'd also love to hear your opinions on how you would like this solution to be catered for your use-cases

Requirement: Preview Dark Mode for each client (main use-cases) since dark mode works differently for each email client