title: SuggestBox in GWT not scrolling with keyboard
body: <p>I'm using gwt-suggestbox (GWT 2.4) in my project. It contains huge number of records so I put scroll here.</p>
  
  <p>When I scroll with mouse its showing all records, but when I use my keyboard down/up keys records don't show, and keyboard scroll not working.</p>
  
  <pre><code>SuggestBox suggestbox = new SuggestBox(getCountries());
  
  MultiWordSuggestOracle getCountries() {
  
      MultiWordSuggestOracle countries = new MultiWordSuggestOracle();
  
      countries.add("Haiti");
      countries.add("Heard Island And Mcdonald Islands");
      countries.add("Holy See");
      countries.add("Honduras");
      countries.add("Hong Kong");
      countries.add("Hungary");
      countries.add("Iceland");
      countries.add("India");
      countries.add("Indonesia");
      countries.add("Iran");
      countries.add("Iraq");
      countries.add("Ireland");
      countries.add("Israel");
      countries.add("Italy");
      countries.add("Jamaica");
      countries.add("Japan");
      countries.add("Jordan");
      countries.add("Kazakstan");
      countries.add("Kenya");
      countries.add("Kiribati");
      countries.add("South Korea");
      countries.add("North Korea");
      countries.add("Kuwait");
      countries.add("Laos");
      countries.add("Latvia");
      countries.add("Lebanon");
      countries.add("Lesotho");
      countries.add("Liberia");
      countries.add("Libyan Arab Jamahiriya");
      countries.add("Liechtenstein");
      countries.add("Lithuania");
      countries.add("Luxembourg");
      countries.add("Macau");
      countries.add("Madagascar");
      countries.add("Malawi");
      countries.add("Malaysia");
      countries.add("Maldives");
      countries.add("Mali");
      countries.add("Malta");
      countries.add("Marshall Islands");
      countries.add("Martinique");
      countries.add("Mauritania");
      countries.add("Mauritius");
      countries.add("Mayotte");
      countries.add("Mexico");
      countries.add("Micronesia");
      countries.add("Moldova");
      countries.add("Monaco");
      countries.add("Mongolia");
      countries.add("Montserrat");
  
      countries.add("Thailand");
      countries.add("Togo");
      countries.add("Tokelau");
      countries.add("Tonga");
      countries.add("Trinidad And Tobago");
      countries.add("Tunisia");
      countries.add("Turkey");
      countries.add("Turkmenistan");
      countries.add("Turks And Caicos Islands");
      countries.add("Tuvalu");
      countries.add("Ukraine");
      countries.add("United Arab Emirates");
      countries.add("United Kingdom");
      countries.add("United States Minor Outlying Islands");
      countries.add("United States");
      countries.add("Uruguay");
      countries.add("Uzbekistan");
      countries.add("Vanuatu");
      countries.add("Venezuela");
      countries.add("Viet Nam");
      countries.add("Virgin Islands, British");
      countries.add("Virgin Islands, U.S.");
      countries.add("Wallis And Futuna");
      countries.add("Western Sahara");
      countries.add("Yemen");
      countries.add("Yugoslavia");
      countries.add("Zambia");
      countries.add("Zimbabwe");
      return countries;
  }
  }
  </code></pre>