Fix minor issues

- fixed indentation
- moved navbars and policy popup to "partials"
- fixed broken image if website icon wasn't set

partials/tag-card-big.hbs

@@ -1,6 +1,6 @@
 <article class="{{post_class}}">
   <a class="mind-tag-card_main" href="{{url}}">
-    <img class="mind-tag-card_feature-image" src="{{img_url feature_image size="s"}}" />
+    <img class="mind-tag-card_feature-image" src="{{img_url feature_image size="s"}}"  alt="Feature Image"/>
     <header class="mind-tag-card_header">
       <h4>{{name}}</h4>
     </header>