<div class="panel panel-default">
  <div class="panel-heading">
    <i class="fa fa-bar-chart" aria-hidden="true"></i> Summary
  </div>
  <div class="list-group">
    <li class="list-group-item" ng-click="highlight(tag)" ng-repeat="(tag, count) in summary | orderBy:'toString()'">
    <span class = "badge">{{count}}</span> <code><{{tag}}></code>
    </li>
  </div>
</div>

<div class="panel panel-default">
  <div class="panel-heading">
    <i class="fa fa-bar-chart" aria-hidden="true"></i> Summary
  </div>
  <div class="list-group">
    <button type="button" class="list-group-item" ng-click="highlight(tag)" ng-repeat="(tag, count) in summary | orderBy:'toString()'">
      <span class="badge">{{count}}</span> <code><{{tag}}></code>
    </button>
  </div>
</div>

Use button so that we have mouse over effect
Use button so that we have mouse over effect
