title: Set focus on element with Protractor
body: <p>I'm interacting with a web page using Protractor. I need to browse a dropdown list (which shows 1/3 of a bigger list) and I'm using the DOWN key in order to do it:</p>
  <pre><code>browser.actions().sendKeys(protractor.Key.DOWN).perform();
  </code></pre>
  <p>When I hit the bottom of the list, I click on a button to go to part 2/3 of the entire list.</p>
  <p>The problem is, after hitting this button and accessing part 2/3, I'm not able to browse the list. The focus is on the button I just clicked. The browse the list, the focus needs to be on one of the list's elements.</p>
  <p>How can I set the focus on a web element using Protractor?</p>