Add babel-polyfill to support Promises in IE11

analytics_dashboard/static/js/application-main.js

 /**
  * Load scripts needed across the application.
  */
+require('babel-polyfill');  // EDUCATOR-1184: this defines Promise for IE11
 require('sass/style-application.scss');
 require(process.env.THEME_SCSS);
 

package.json

@@ -10,6 +10,7 @@
     "babel-plugin-dynamic-import-node": "^1.0.2",
     "babel-plugin-syntax-dynamic-import": "^6.18.0",
     "babel-plugin-transform-runtime": "^6.23.0",
+    "babel-polyfill": "^6.26.0",
     "babel-preset-env": "^1.6.0",
     "babel-preset-es2015": "^6.24.1",
     "babel-runtime": "^6.25.0",