title: Default for ng-select not working
body: <p>I have a form using a select. I'm trying to set a default value, which I want to disable, so the dropdown will show "-- select state --" as the first option and will force the user to make a selection.</p>
  
  <p>My problem is it's not working and the select always starts out blank.</p>
  
  <p>Here is my code:</p>
  
  <pre><code>    &lt;select ng-model="contactEditCtrl.addressData.state" style="width: 50%;"&gt;
        &lt;option ng-disabled="$index === 1"  ng-selected="true"&gt;--Select State--&lt;/option&gt;
        &lt;option value="{{state.abbreviation}}" ng-repeat="state in contactEditCtrl.states"&gt;{{state.name}}&lt;/option&gt;
      &lt;/select&gt;
  </code></pre>