Move dark mode user preference outside of themes
Exploration MR: !100672 (closed)
To differentiate modes from themes, move "Dark mode" from themes in user preferences to it's own section. The user can select between Light (default) and Dark mode. Future iterations could include an "Auto" setting which would determine light/dark presentation from System/OS preferences using the prefers-color-scheme
media query.
Edited by Scott de Jonge