title: backgrid filter, custom template?
body: <p>I am trying to change the of Backgrid.Extension.ClientSideFilter</p>
  
  <pre><code>template: _.template('&lt;div class="input-prepend input-append"&gt;&lt;span class="add-on"&gt;&lt;i class="icon-search"&gt;&lt;/i&gt;&lt;/span&gt;&lt;input type="text" &lt;% if (placeholder) { %&gt; placeholder="&lt;%- placeholder %&gt;" &lt;% } %&gt; name="&lt;%- name %&gt;" /&gt;&lt;span class="add-on"&gt;&lt;a class="close" href="#"&gt;&amp;times;&lt;/a&gt;&lt;/span&gt;&lt;span class="add-on"&gt;&lt;div class="red" id="&lt;%- idDivCantidadResultados %&gt;"&gt;&lt;/div&gt;&lt;/span&gt;&lt;/div&gt;'),
  </code></pre>
  
  <p>but i don't know how to change.</p>