title: Pointer-Events Not allowed doesn't stop keyboard inputs
body: <p>The pointer-events doesn't stop the keyboard from tabing to the dropdown arrow and hitting space-bar to open up the dropdown. Is there CSS to block the keyboard interactions?  Below is an example of what I tried to block the pointer/keybard/cursor from interacting with the dropdown.  It seems to work in the code snippet but doesn't work on my site.  I am using chrome to test. Using bootstrap 3.</p>
  <p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
  <div class="snippet-code">
  <pre class="snippet-code-css lang-css prettyprint-override"><code>.disabled{
     pointer-events: none !important;
      cursor: not-allowed !important;
      -moz-user-focus: none !important;
      -webkit-user-focus: none !important;
      -ms-user-focus: none !important;
      user-focus: none !important;
      -moz-user-modify: read-only !important;
      -webkit-user-modify: read-only !important;
      -ms-user-modify: read-only !important;
      user-modify: read-only !important;
      -moz-user-select: none !important;
      -webkit-user-select: none !important;
      -ms-user-select: none !important;
      user-select: none !important;
  }</code></pre>
  <pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet"/&gt;
  
  &lt;div&gt;&lt;a href="#"&gt;Above Link&lt;/a&gt;&lt;/div&gt;
  &lt;div class="btn-group disabled"&gt;&lt;a href="#" class="btn btn-warning"&gt;Warning&lt;/a&gt;&lt;a href="#" data-toggle="dropdown" class="btn btn-warning dropdown-toggle" aria-expanded="true"&gt;&lt;span class="caret"&gt;&lt;/span&gt;&lt;/a&gt;&lt;ul class="dropdown-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;div&gt;&lt;a href="#"&gt;After Link&lt;/a&gt;&lt;/div&gt;</code></pre>
  </div>
  </div>
  </p>