Category watch state (#7109)

* feat: wip, category watch change

* feat: pass data to client

* feat: allow changing state

* fix: account page categories

* fix: show in unread if topic is followed or category is watched

* feat: add default watch state to acp

* feat: save user category watch state

* feat: update unread recent pages

* fix: remove dupe code

* fix: flip conditions

* fix: handle empty arrays

* fix: ignore/watch on others profile

* feat: upgrade script for category states

if there are any users ignoring categories set their state in new zset and delete cid:<cid>:ignorers

* fix: upgrade

* fix: tests

* fix: redis count

* fix: more tests

src/search.js

@@ -330,7 +330,7 @@ function getSearchCids(data, callback) {
 			async.parallel({
 				watchedCids: function (next) {
 					if (data.categories.includes('watched')) {
-						user.getWatchedCategories(data.uid, next);
+						user.getCategoriesByStates(data.uid, [categories.watchStates.watching], next);
 					} else {
 						setImmediate(next, null, []);
 					}