title: Explicitly set disabled="false" in the HTML does not work
body: <p>I would like to explicitly set a button as enabled <strong>in the html file</strong>. The reason is that my code later on toggles the button to disabled and if the code crashes or so I might see the button disabled. </p>
  
  <p>I can disable the button with </p>
  
  <pre><code>$("#btn").attr("disabled","true")
  </code></pre>
  
  <p>but then an html containing:</p>
  
  <pre><code>&lt;button id="btn" disabled="false"&gt;I want to be enabled!&lt;/button&gt;
  </code></pre>
  
  <p>still shows the button as disabled. 
  The inspector shows: </p>
  
  <pre><code>&lt;button id="btn" disabled=""&gt;I want to be enabled!&lt;/button&gt;
  </code></pre>
  
  <p>I know I can do </p>
  
  <pre><code>$("#btn").removeAttr("disabled") 
  </code></pre>
  
  <p>or similar, but it is not convenient to do that for many elements in the html.</p>