title: Bootstrap's selectpicker() title contains HTML
body: <p>We are using Bootstrap's selectpicker() with data-icon defined. Here is our HTML code:</p>
  
  <pre><code>&lt;select class="selectpickerLang" name="language" id="id_language"&gt;
  &lt;option value="en-us" data-icon="icon-en-us"&gt;English, United States&lt;/option&gt;
  &lt;option value="en-gb" data-icon="icon-en-gb"&gt;English, United Kingdom&lt;/option&gt;
  &lt;/select&gt;
  
  $(document).ready(function() {
      $('.selectpickerLang').selectpicker();
  });
  </code></pre>
  
  <p>(in some cases we have more locales).</p>
  
  <p>The problem is that the title of the button (tested with Google Chrome) contains HTML:</p>
  
  <pre><code>&lt;button type="button" class="btn dropdown-toggle selectpicker btn-default" data-toggle="dropdown" data-id="id_language" title="&amp;lt;i class=&amp;quot;glyphicon icon-en-us&amp;quot;&amp;gt;&amp;lt;/i&amp;gt; English, United States"&gt;&lt;span class="filter-option pull-left"&gt;&lt;i class="glyphicon icon-en-us"&gt;&lt;/i&gt; English, United States&lt;/span&gt;&amp;nbsp;&lt;span class="caret"&gt;&lt;/span&gt;&lt;/button&gt;
  </code></pre>
  
  <p>You can see the title is "<code>&lt;i class="glyphicon icon-en-us"&gt;&lt;/i&gt; English, United States</code>". The correct title is "<code>English, United States</code>".</p>
  
  <p>We are using Bootstrap version 2.3.2, but I think this feature is created by bootstrap-select version 1.4.2. Has it been fixed in future versions?</p>