active-region not applied to elements different from "node"

If you use contextual on elements different from nodes (e.g. "block") the class contextual-region-active is never set. This is because the class is set to elements with ".node" only if you hover over a.contextual-toggler.

Changing the lines 28..33 of contextual.js to the following code fixes this:

  $('a.contextual-toggler').add($links).hover(function(event) {
    $(this).parents('.contextual-enabled').addClass('contextual-region-active');
  },
  function() {
    $(this).parents('.contextual-enabled').removeClass('contextual-region-active');
  });

.