typeahead: add "selected" custom event

Created by: evil-shrike

I need to handle a case when a user selects an options from dropdown menu. I need to distinguish entered text and chosen from dropdown menu. It's imposible without the custom event.

, select: function () {
  var val = this.$menu.find('.active').attr('data-value')
  this.$element.val(val)
  this.$element.change();
  this.$element.trigger("selected");    // <- ADD THIS
  return this.hide()
}