Fix rendering of notifications

src/invidious/views/subscriptions.ecr

@@ -15,15 +15,15 @@
     </div>
 </div>
 
-<div class="h-box">
 <center><%= notifications.size %> unseen notifications</center>
 <% notifications.each_slice(4) do |slice| %>
+    <div class="pure-g">
         <% slice.each do |video| %>
             <%= rendered "components/video" %>
         <% end %>
+    </div>
 <% end %>
 <hr>
-</div>
 
 <% videos.each_slice(4) do |slice| %>
     <div class="pure-g">