This is now implemented per:
https://github.com/discourse/discourse/commit/1411eedad3d1715d7a58a08ab77630f73844a1c7
When you unwatch a category you also get a chance to unwatch all the old topics in that category when saving user prefs.
This is now implemented per:
https://github.com/discourse/discourse/commit/1411eedad3d1715d7a58a08ab77630f73844a1c7
When you unwatch a category you also get a chance to unwatch all the old topics in that category when saving user prefs.