test dashboard using es6 import

Author: archmoj

devtools/test_dashboard/index.html

@@ -20,7 +20,7 @@
   <div id="snapshot"></div>
 
   <script src="../../node_modules/mathjax/MathJax.js?config=TeX-AMS-MML_SVG"></script>
-  <script id="source" src="../../build/plotly.js" charset="utf-8"></script>
-  <script src="../../build/test_dashboard-bundle.js" charset="utf-8"></script>
+  <script charset="utf-8" id="source"  type="module">import "../../build/plotly.js"</script>
+  <script charset="utf-8" src="../../build/test_dashboard-bundle.js"></script>
 </body>
 </html>