title: Angular ng-keyup not working for uib-dropdown-menu
body: <p>I have a drop down where the item size is large so I am looking for a way to enable keyboard-input (<em>key press</em>) so that I can type and it automatically moves to that option in the drop down. Any suggestions?</p>
  
  <p>Tried this, but not showing any difference :</p>
  
  <pre><code> &lt;div class="btn-group" uib-dropdown dropdown-append-to-body ng-keyup="onKeyUp($event)"&gt;
        &lt;button id="btn-append-to-body" type="button" class="btn btn-primary" uib-dropdown-toggle&gt;
          Dropdown on Body &lt;span class="caret"&gt;&lt;/span&gt;
        &lt;/button&gt;
      &lt;ul uib-dropdown-menu role="menu" style="max-height: 150px; overflow-y: auto; max-width : 10px" &gt;
        &lt;li ng-repeat="value in feature.values | filter: tappedKeys | unknownValueFilter | featureValueOrder "&gt;
          &lt;a ng-click="currentValue.set(value)" href=""&gt;
            {{value | featureValueFormatter }}
          &lt;/a&gt;
        &lt;/li&gt;
      &lt;/ul&gt;
  &lt;/div&gt;
  </code></pre>
  
  <p>In the controller :</p>
  
  <pre><code>$scope.tappedKeys = '';
  
  $scope.onKeyUp = (e)=&gt;{
    $scope.tappedKeys += e.key;
  };
  </code></pre>
  
  <p>But the issue is the key pressed values are not clearing also when the drop down values are becoming normal once I select the value
  Example : <a href="https://plnkr.co/edit/vZCv3RI095snv9ITAXr8?p=preview" rel="nofollow noreferrer">https://plnkr.co/edit/vZCv3RI095snv9ITAXr8?p=preview</a></p>