fix: use query param sort over user setting if it's set

regression from 77ddfc642e

public/src/client/topic/posts.js

@@ -270,7 +270,7 @@ define('forum/topic/posts', [
 			after: after + (direction > 0 ? 1 : 0),
 			count: config.postsPerPage,
 			direction: direction,
-			topicPostSort: config.topicPostSort,
+			topicPostSort: utils.params().sort || config.topicPostSort,
 		}, function (data, done) {
 			indicatorEl.fadeOut();