title: Sencha Touch Label - does it have a Tap Event?
body: <p>I'm trying to build a flashcard app with sencha touch 2.
  I have a label showing the question, which takes up the entire screen, I want it so that when the user taps on the label the answer shows.
  Does the label have a 'tap' event? It works when I use a button, but not when I use a label.</p>
  
  <p>Another way around is if I can get the button to be transparent on top of a label.
  Any suggestions?</p>