title: two dropdowns for Angular UI Bootstrap do not work
body: <p>I simply created a second dropdown by copying and pasting the official Angular UI Bootrstrap Dropdown sample and now neither one pulls down the menu. See plunker at </p>
  
  <p><a href="http://plnkr.co/edit/Xpp4sBSOoCK2lNZN3ZrL?p=preview" rel="noreferrer">http://plnkr.co/edit/Xpp4sBSOoCK2lNZN3ZrL?p=preview</a></p>
  
  <pre><code>&lt;!-- Single button 1--&gt;
  &lt;div class="btn-group" dropdown is-open="status.isopen"&gt;
    &lt;button id="btn1" type="button" class="btn btn-primary dropdown-toggle" ng-disabled="disabled"&gt;
      Button dropdown &lt;span class="caret"&gt;&lt;/span&gt;
    &lt;/button&gt;
    &lt;ul class="dropdown-menu" role="menu"&gt;
      &lt;li&gt;&lt;a href="#"&gt;Action&lt;/a&gt;&lt;/li&gt;
      &lt;li&gt;&lt;a href="#"&gt;Another action&lt;/a&gt;&lt;/li&gt;
      &lt;li&gt;&lt;a href="#"&gt;Something else here&lt;/a&gt;&lt;/li&gt;
      &lt;li class="divider"&gt;&lt;/li&gt;
      &lt;li&gt;&lt;a href="#"&gt;Separated link&lt;/a&gt;&lt;/li&gt;
    &lt;/ul&gt;
  &lt;/div&gt;
  &lt;!-- Single button 2--&gt;
  &lt;div class="btn-group" dropdown is-open="status.isopen"&gt;
    &lt;button id="btn2" type="button" class="btn btn-primary dropdown-toggle" ng-disabled="disabled"&gt;
      Button dropdown1 &lt;span class="caret"&gt;&lt;/span&gt;
    &lt;/button&gt;
    &lt;ul id="list2" class="dropdown-menu" role="menu"&gt;
      &lt;li&gt;&lt;a href="#"&gt;Action&lt;/a&gt;&lt;/li&gt;
      &lt;li&gt;&lt;a href="#"&gt;Another action&lt;/a&gt;&lt;/li&gt;
      &lt;li&gt;&lt;a href="#"&gt;Something else here&lt;/a&gt;&lt;/li&gt;
      &lt;li class="divider"&gt;&lt;/li&gt;
      &lt;li&gt;&lt;a href="#"&gt;Separated link&lt;/a&gt;&lt;/li&gt;
    &lt;/ul&gt;
  &lt;/div&gt;
  </code></pre>