Dark Theme and Theme Variety

[Quebecshire]

I will look into a dark theme sometime today, hopefully.

I will note that while I encourage using the full extent of this forum's customization features, themes are a bit of a pain (they require a lot of code edits in the .css files, at least one edit for every little thing being changed). So I'm not sure how many we'll ultimately have, and we'll probably develop them more over time.

Once dark mode is completed that will put us at three themes, which should be a solid start before going public. Thank you for the suggestion.