Fixing issue with igZoombar buttons in sample

Author: MayaKirova

samples/igDataChart/igDataChart.html

@@ -6,6 +6,7 @@
 	<link href="http://cdn-na.infragistics.com/igniteui/latest/css/structure/infragistics.css" rel="stylesheet" />
 	<!-- 1. Load libraries -->
 	<script src="http://code.jquery.com/jquery-1.12.3.js"></script>
+	<script src="http://netdna.bootstrapcdn.com/bootstrap/3.1.1/js/bootstrap.min.js"></script>
 	<script src="http://code.jquery.com/ui/1.10.3/jquery-ui.min.js"></script>
     <!-- IE required polyfills, in this exact order -->
     <script src="https://cdnjs.cloudflare.com/ajax/libs/es6-shim/0.35.0/es6-shim.min.js"></script>
@@ -24,7 +25,7 @@
 	<link rel="stylesheet" href="../sample.css" />
 	<link type="text/css" rel="stylesheet" href="http://netdna.bootstrapcdn.com/bootstrap/3.1.1/css/bootstrap.min.css" />
 	<link rel="stylesheet" href="http://netdna.bootstrapcdn.com/font-awesome/4.0.3/css/font-awesome.min.css" type="text/css" />
-	<script src="http://netdna.bootstrapcdn.com/bootstrap/3.1.1/js/bootstrap.min.js"></script>
+
 	<script>
 		System.import('app.ts')
             .then(null, console.error.bind(console));