FIX: When viewing a summary, if a post jumps to the bottom cancel it.

app/assets/javascripts/discourse/lib/url.js.es6

@@ -217,6 +217,8 @@ const DiscourseURL = Ember.Object.createWithMixins({
         if (path.match(/last$/)) { opts.nearPost = topicController.get('model.highest_post_number'); }
         const closest = opts.nearPost || 1;
 
+        opts.cancelSummary = true;
+
         postStream.refresh(opts).then(() => {
           topicController.setProperties({
             'model.currentPost': closest,

app/assets/javascripts/discourse/models/post-stream.js.es6

@@ -194,6 +194,11 @@ export default RestModel.extend({
     opts = opts || {};
     opts.nearPost = parseInt(opts.nearPost, 10);
 
+    if (opts.cancelSummary) {
+      this.set('summary', false);
+      delete opts.cancelSummary;
+    }
+
     const topic = this.get('topic');
 
     // Do we already have the post in our list of posts? Jump there.