title: How to click on hidden element in protractor?
body: <p>I have an element which is visible only when I hover over it.</p>
  
  <p>I've written following code to hove over the panel so that the element is visible.</p>
  
  <pre><code>ptor.actions().
              mouseMove(ptor.findElement(protractor.By.xpath('//*[@id="productapp"]/div/div/div[2]/div/div/div/div[2]/div/div/div/div[4]/table/thead/tr/th[2]'))).
              perform();
          ptor.element.all(by.tagName('i')).then(function(elm){
              elm[0].click();
          });
  </code></pre>
  
  <p>Now I tried to click on it, but it says -
      ElementNotVisibleError: element not visible
  error in protractor.</p>
  
  <p>Basic scenario is, I want to hover over a panel and then click on the hidden element, because the element is not visible until it is hovered over.</p>