title: What is the Angular way of showing an indicator on a button carrying an http request action?
body: <p>We tend to give class to each form that the controller works with and the button so that we can identify button uniquely, and using jquery we get hold of the button and toggle the spinner gif on and off but this approach ties the controller with with UI a lot.</p>
  
  <p>What could we do to hardwiring the controllers with the form classes ?</p>