Topic await errors (#7727)

* feat: derp await

* feat: restore user.getSettings

* feat: cleanup

* feat: make tid const

* feat: cleanup

* fix: tests

* feat: deprecate filter:controllers.topic.get

* feat: rewrite post-index logic

* feat: change calculation to match others

* fix: use .async

* feat: remove try/catch wrapper

src/posts/topics.js

@@ -60,10 +60,7 @@ module.exports = function (Posts) {
 						Posts.getPostIndices(postData, uid, next);
 					},
 					topics: function (next) {
-						var tids = postData.map(function (post) {
-							return post ? post.tid : null;
-						});
-
+						const tids = postData.map(post => post && post.tid);
 						topics.getTopicsFields(tids, ['slug'], next);
 					},
 				}, next);