title: Angular Ui Typeahead not showing placeholder
body: <p>I have an input which uses typeahead but the placeholder is not being rendered. What should I do to make it show the placeholder?</p>
  
  <p>I'm using "angular-bootstrap": "~0.14.0"</p>
  
  <pre><code>&lt;input type="text" name="scheduler_name"
  ng-model="appointment.scheduler_name" uib-typeahead="scheduler.name as scheduler.contact_info for scheduler in findSchedulerByName($viewValue) | limitTo:7"
  typeahead-loading="loadingSchedulers" typeahead-no-results="noResults"
  typeahead-on-select="setSchedulerAttributes($item, $model, $label)" class="form-control input-lg" 
  placeholder="(Name, Carrier, Broker or Phone)" server-error&gt;
  </code></pre>
  
  <p>Screenshot:</p>
  
  <p><a href="https://i.stack.imgur.com/WuXzQ.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/WuXzQ.png" alt="enter image description here"></a></p>