title: How to declaratively bind pseudo-boolean attributes like disabled/checked to boolean values?
body: <p>Is there an easy way to bind attributes like <code>disabled</code> or <code>checked</code> to true/false properties? Something like</p>
  
  <p><code>&lt;button disabled="{{myBooleanProperty}}"&gt;Ok&lt;/button&gt;
  </code></p>
  
  <p>doesn't work as desired. If myBooleanProperty is false, this sets <code>disabled="false"</code>, which is <em>true</em> as far as HTML is concerned.</p>
  
  <p>Is there a filter expression that can hint to the binding parser that the attribute should be completely removed if the value is false?</p>