mailr/app/views/shared/_folders.html.erb

<div id="folders">
  <h4><%=t :folders %><br/><%= link_to 'add/edit', folders_path %></h4>
  <hr/>
  <ul>
    <% @folders.each do |folder| -%>
    <li><%= folder_link(folder) %></li> 
    <% end -%> 
  </ul>
</div>
<div style="text-align: center; padding: 10px;">
  <input type="button" value="<%= t :logout %>" onclick="window.location='/login/logout'">
</div>