What theme component is adding a theme toggle to the sidebar on Meta?

[Moin]

Sidebar theme toggle

Summary Sidebar Theme Toggle adds a theme selector in the sidebar menu’s footer provided there is more than 1 user selectable theme. This selector works with both logged-on users and anonymous users. Be sure to add this to all your user-selectable themes for easy toggling. Repository Link https://github.com/discourse/discourse-sidebar-theme-toggle New to Discourse Themes? Beginner’s guide to using Discourse Themes Install this theme…