title: render a shinydashboard infobox... without shinydashboard
body: <p>I work on a Shiny application that is built on the standard layout (<code>fluidpage()</code>, I cannot change this), and I need to display some reactive KPIs to the user, which <strong>color , icon and text</strong> depend on the results of some computations. The ideal format for this kind of information would be an object like an <code>infoBox()</code> from shinydashboard just like this:</p>
  
  <p><a href="https://i.stack.imgur.com/pFJYQ.png" rel="noreferrer"><img src="https://i.stack.imgur.com/pFJYQ.png" alt="enter image description here"></a></p>
  
  <p>Of course, when I put this code in a fluidpage it looses its styles:</p>
  
  <pre><code>infoBox("Accuracy",  "50%",  icon = icon("ok", lib = "glyphicon"), color = "yellow")
  </code></pre>
  
  <p><a href="https://i.stack.imgur.com/fIrZw.png" rel="noreferrer"><img src="https://i.stack.imgur.com/fIrZw.png" alt="enter image description here"></a></p>
  
  <p>What I tried: </p>
  
  <ul>
  <li><p>add a dashboard page inside my fluidpage application, which works but i could't remove the menu, header, and other stuff around it.</p></li>
  <li><p>try to customized textoutput which is not very nice:
  <a href="https://i.stack.imgur.com/NMz5n.png" rel="noreferrer"><img src="https://i.stack.imgur.com/NMz5n.png" alt="enter image description here"></a></p></li>
  <li>I didn't know how to add the glyphicon nicely. </li>
  </ul>
  
  <p>Do you have any solution to achieve? 
  Thanks,</p>