Update Kanban Board Theme Component so that it shows sub-categories on the category page when in #tag mode

[deborahchang (Deborah Chang / 張元悅)]

https://meta.discourse.org/t/kanban-board-theme-component/118164/118

DEFAULT MODES
online-forum:tags:faq,idea,scoping,ready,in-progress,evaluating,celebrating,done,@untagged

CURRENT SETTINGS