title: angular ng-option add icon
body: <p>I am trying to write a dropdown list for selecting country, is possible to add flag of country next to the country name??
  <a href="https://i.stack.imgur.com/pzK8W.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/pzK8W.png" alt="enter image description here"></a></p>
  
  <pre><code> &lt;div class="chosen-input-group col-sm-10 "&gt;
          &lt;select id="country_type" chosen data-placeholder="-- 國家 --" disable-search="false"
                  ng-options="country_.country_id as country_.name  for country_ in vm.country_data" 
                  ng-model="vm.item.country_id"&gt;
              &lt;option value=""&gt; -- 國家 --&lt;/option&gt;
          &lt;/select&gt;
      &lt;/div&gt;
  </code></pre>