Fix for not expanding

After some update, the plugin did not react to clicks any more. It would properly initialize and collapse the categories, but clicking wouldn’t expand them.

My one-line fix was to replace appendIcon() with the following:

  appendIcon : function($el) {
    $el.find('a').first().after('<div class="wcsca-icon">'+this.closedIcon+'</div>');
    $el.find('.wcsca-icon').click(this.deligate);

  },