title: Invisible link does not display if using java webdriver
body: <p>I have a block, "Categories". 
  This block has a invisible config link (config link: <code>&lt;a class="contextual-links-trigger" href="#"&gt;Configure&lt;/a&gt;</code>)
  When i manual move mouse to this block, config link become to <code>&lt;a class="contextual-links-trigger contextual-links-trigger-active" href="#"&gt;Configure&lt;/a&gt;</code> and config icon displays (base on the new class "contextual-links-trigger-active").
  when i click config icon, link "Edit view" will display. (see image)</p>
  
  <p>image link: <a href="https://www.facebook.com/photo.php?fbid=448612048582483&amp;set=a.152871061489918.29073.100003010769102&amp;type=1&amp;theater" rel="nofollow">https://www.facebook.com/photo.php?fbid=448612048582483&amp;set=a.152871061489918.29073.100003010769102&amp;type=1&amp;theater</a></p>
  
  <p>I want to click link "Edit view" use java web driver. 
  I used code below to display config icon but not successful:</p>
  
  <pre><code>Actions builder = new Actions(driver);
          builder.moveToElement(driver.findElement(By.xpath(xpath))).perform();
  </code></pre>
  
  <p>Please give me some ideas. Thanks! </p>