title: Sahi case sensitive issue
body: <p>I have come across and issue where different browsers return fields in different cases (upper, lower). For the most part the following method works for me: </p>
  
  <pre><code>_click(_link("/Next/i")); 
  </code></pre>
  
  <p>However I have one item on the web page with brackets in the name and this approach does not work:</p>
  
  <pre><code>_assert(_isVisible(_link("/Noticeboard(Active Tab)/i")));
  </code></pre>
  
  <p>Any ideas on how to overcome this?</p>
  
  <p>Regards</p>