Dark mode

[lucassimon]

It would be great if there was a button to change the theme to dark

[igor-baiborodine]

@lucassimon, yes, having a dark theme variation would be nice, but currently, it's not a priority. I'm presently concentrated on v4 development, and I don't see that it will be implemented shortly unless someone volunteers for this task.

Duplicate of #315.

I'm converting this issue to a Discussions/Ideas item.