title: Ember sortBy on property:desc is not the same as reverse
body: <p>In Ember 2, I tried <code>sortBy</code> on an Enumerable.</p>
  
  <p>The <code>sortBy('something:asc')</code> works correct. But <code>sortBy('something:desc')</code> is not the same as <code>sortBy('something:asc').reverse()</code>. ( Is it not <code>desc</code>?)</p>
  
  <p>I tried to change <code>something</code> property to boolean or string or number. It seems only "string" type works with <code>reverse</code>.</p>