title: bootstrap3-typeahead select first element with TAB
body: <p>The bootstrap3-typeahead has a function select, that selects the highlighted element in the dropdown.
  What I want is instead of the highlighted element, the first element should be selected.
  In the keyup function there is the case 9 for TAB.
  I tried to set the first item as active, but this is wrong:</p>
  
  <pre><code>this.$menu.items[0].setAttribute('.active');
          var val = this.$element.find('.active').data('value');
          if (this.autoSelect || val) {
              this.$element
                    .val(this.updater(val))
                    .change();
          }
  </code></pre>
  
  <p>with this.prev() I can select the previos item, is there anything like this.first() ??</p>