auto-select the first result in the search

static/js/directives/ui/header-bar.js

@@ -79,7 +79,7 @@ angular.module('quay').directive('headerBar', function () {
           $scope.searchResultState = {
             'state': resp.results.length ? 'results' : 'no-results',
             'results': resp.results,
-            'current': -1
+            'current': resp.results.length ? 0 : -1
           };
         }, function(resp) {
           $scope.searchResultState = null;