Fix the user profile feed jumping in Safari

Closes #92 (closed)

app/templates/account/statuses.hbs

@@ -15,11 +15,13 @@
 {{else}}
   <Feed::Loader
     @feed={{this.model.feed}}
-    @beginingOfFeedCallout={{false}}
+    @beginningOfFeedCallout={{false}}
+    as |feed|
   >
-    {{#each this.model.feed.content key="id" as |status index|}}
+    {{#each feed.content key="id" as |status index|}}
       <FeedItem
         @feedItem={{status}}
+        @hideUnseen={{true}}
         @posinset={{add index 1}}
         @setsize={{this.model.feed.content.length}}
       />