title: hide only clear button in angular js datepicker directive
body: <p>I want to hide only clear button from datepicker directive in angular js.
  Currently there are three buttons at the bottom of the angular js datePicker directive(Today, clear and Close), Is there any way to make visibility of these buttons configurable, such that i can hide one of the buttons out of it.</p>
  
  <p>The Date picker which i am using is using ui-bootstrap library.</p>