更新到2.9.0beta1后，Discourse主题选择不工作

[sam (Sam Saffron)]

只是确认一下，你们是否已迁移到使用官方的 sidebar-theme-toggle？

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 them…

这是目前支持的主题切换方式（就像我们在 meta 上做的那样）。