title: Display progress (circle) while submitting bootstrap form using AngularJS
body: <p>I have form I am building using bootstrap, and it's submitting data to remote server using $http, but there's a time delay in the middle. </p>
  
  <p>I'd like to know how to implement a progress (circle in the middle of the page) to let the user know the form is being submitted, is there a functionality using Angular UI services? I have searched for that and didn't find. Or should I implement this using bootstrap? </p>