title: ng-click on accordion panel header
body: <p>I have been working on angularjs uib-accordion , I am able to make it functional, now when I click on panel title it expands that's fine, but what I am trying is when I click anywhere on panel heading it should also expand. Need some suggestion on it.</p>
  
  <pre><code>&lt;uib-accordion&gt;
      &lt;uib-accordion-group style="border-radius:0px !important; margin:10px;"ng-repeat="filter in filterGroup" heading="{{filter.label}}"&gt;
          Some code
      &lt;/uib-accordion-group&gt;
  &lt;/uib-accordion&gt;
  </code></pre>