title: jQuery cssHooks is not called
body: <p>I am trying to hook css get/set. However after installing a simple pass thru hook it seems to be not called: (no error messages in Chrome console)</p>
  
  <pre><code>    $.cssHooks['padding-left'] = {
          get: function( elem, computed, extra ) {
              return $.css( elem, $['padding-left'] );
          },
          set: function( elem, value) {
              // Setting breakpoint here in Chrome, this line is not called:
              elem.style[ $.support['padding-left'] ] = value;
          }
      };
      // Proof of concept: Should not this statement initiate the hooked setter call?
      // This statement is called, confirmed via breakpoint
      $('#et-top-navigation').css('padding-left', '0px');
  </code></pre>
  
  <p>What am I missing?</p>