Categories are ordered based on activity per:
https://github.com/discourse/discourse/commit/996e5e5dfa3faefc6e96a623db5c2d4f5cb3df81
Categories are ordered based on activity per:
https://github.com/discourse/discourse/commit/996e5e5dfa3faefc6e96a623db5c2d4f5cb3df81