title: dijit.TitlePane arrow down not displayed in XPages with ExtLib
body: <p>I have defined simple titlePane dijits in Xpages which uses the ExtLib Bootstrap theme.</p>
  
  <p>When the titlePane is collapsed I get an (closed) arrow icon displayed.</p>
  
  <p>When the titlePane is expanded I get the indication that the icon for a caret-down can not be found.</p>
  
  <p>When I disable the Bootstrap theme and run oneUI when collapsed no icon is diplayed BUT when I expand the titlepane a nice carot-down icon is displayed.</p>
  
  <p>Is this due to a failure of the implementation of Bootstrap in the ExtLib?</p>
  
  <p>here is my code:</p>
  
  <pre><code>&lt;xp:div id="titlePaneGemCars" dojoType="dijit.TitlePane" title="German Cars"&gt;
          Audi
          BMW
          Mercedes
          &lt;xp:this.attrs&gt;
              &lt;xp:attr name="open" value="false"&gt;&lt;/xp:attr&gt;
              &lt;xp:attr name="toggleable" value="true"&gt;&lt;/xp:attr&gt;
          &lt;/xp:this.attrs&gt;
      &lt;/xp:div&gt;
      &lt;xp:div id="titlePaneJapBikes" dojoType="dijit.TitlePane"
          title="Japanese Bikes"&gt;
          &lt;xp:this.attrs&gt;
              &lt;xp:attr name="open" value="false"&gt;&lt;/xp:attr&gt;
              &lt;xp:attr name="toggleable" value="true"&gt;&lt;/xp:attr&gt;
          &lt;/xp:this.attrs&gt;
          Honda
          Suzuki
          Yamaha
      &lt;/xp:div&gt;
  </code></pre>
  
  <p>In the generated HTML for an open or closed titlepane I notice the following differences:</p>
  
  <pre><code>&lt;div id="view:_id1:_id37:titlePaneGemCars_titleBarNode" data-dojo-attach-point="titleBarNode" class="dijitTitlePaneTitle dijitTitlePaneTitleOpen dijitOpen" data-dojo-attach-event="ondijitclick:_onTitleClick, onkeydown:_onTitleKey"&gt;
  </code></pre>
  
  <p>and</p>
  
  <pre><code>&lt;div id="view:_id1:_id37:titlePaneGemCars_titleBarNode" data-dojo-attach-point="titleBarNode" class="dijitTitlePaneTitle dijitTitlePaneTitleClosed dijitClosed" data-dojo-attach-event="ondijitclick:_onTitleClick, onkeydown:_onTitleKey"&gt;
  </code></pre>
  
  <p>so the open titlepane has got the  dijitTitlePaneTitleOpen dijitOpen class and the closed one the dijitTitlePaneTitleClosed dijitClosed class.</p>
  
  <p>I can alter the stylesheet for the down caret e.g.</p>
  
  <pre><code>.xsp.dbootstrap .dijitTitlePane .dijitArrowNode::before {
      color: #428bca;
      font-family: "Glyphicons Halflings";
   content: "\e114";
   font-size: 12px;
      padding-left: 10px;
      position: relative;
      top: -1px;
  }
  </code></pre>
  
  <p>which works as a temporarily solution </p>