GUACAMOLE-773: Include required polyfills for Blob and datalist.

guacamole/src/main/frontend/src/index.html

@@ -75,6 +75,10 @@
             </div>
         </div>
 
+        <!-- Polyfills -->
+        <script type="text/javascript" src="Blob.js"></script>
+        <script type="text/javascript" src="datalist-polyfill.min.js"></script>
+
         <!-- Core libraries that MUST be available at the global level (for use
         by extensions) -->
         <script type="text/javascript" src="guacamole-common-js/all.min.js"></script>

guacamole/src/main/frontend/webpack.config.js

@@ -127,6 +127,8 @@ module.exports = {
         // Copy core libraries for global inclusion
         new CopyPlugin([
             { from: 'angular/angular.min.js' },
+            { from: 'blob-polyfill/Blob.js' },
+            { from: 'datalist-polyfill/datalist-polyfill.min.js' },
             { from: 'jquery/dist/jquery.min.js' },
             { from: 'lodash/lodash.min.js' }
         ], {