correct count 0 on user filters

app/assets/javascripts/discourse/templates/user/activity.js.handlebars

@@ -1,5 +1,5 @@
 
-<div id='user-info'> 
+<div id='user-info'>
   <nav class='buttons'>
     {{#if content.can_edit}}
       {{#linkTo "preferences" class="btn"}}{{i18n user.edit}}{{/linkTo}}
@@ -13,7 +13,7 @@
     {{/if}}
   </nav>
   <div class='clearfix'></div>
-  
+
   <ul class='action-list nav-stacked side-nav'>
     {{view Discourse.ActivityFilterView countBinding="statsCountNonPM"}}
     {{#each statsExcludingPms}}
@@ -47,7 +47,7 @@
       <button class='btn' data-not-implemented='true' disabled title="{{i18n not_implemented}}">{{i18n user.download_archive}}</button>
     </div>
   {{/if}}
-  
+
 
 </div>
 

app/assets/javascripts/discourse/views/user/activity_filter_view.js

@@ -10,25 +10,33 @@ Discourse.ActivityFilterView = Discourse.View.extend({
   tagName: 'li',
   classNameBindings: ['active'],
 
-  active: (function() {
-    var content;
-    if (content = this.get('content')) {
+  countChanged: function(){
+    this.rerender();
+  }.observes('count'),
+
+  active: function() {
+    var content = this.get('content');
+    if (content) {
       return parseInt(this.get('controller.content.streamFilter'), 10) === parseInt(Em.get(content, 'action_type'), 10);
     } else {
       return this.blank('controller.content.streamFilter');
     }
-  }).property('controller.content.streamFilter', 'content.action_type'),
+  }.property('controller.content.streamFilter', 'content.action_type'),
 
   render: function(buffer) {
-    var content, count, description;
-    if (content = this.get('content')) {
+    var content = this.get('content');
+    var count, description;
+
+    if (content) {
       count = Em.get(content, 'count');
       description = Em.get(content, 'description');
     } else {
       count = this.get('count');
       description = Em.String.i18n("user.filters.all");
     }
-    return buffer.push("<a href='#'>" + description + " <span class='count'>(" + count + ")</span><span class='icon-chevron-right'></span></a>");
+
+    buffer.push("<a href='#'>" + description +
+        " <span class='count'>(" + count + ")</span><span class='icon-chevron-right'></span></a>");
   },
 
   click: function() {