fix: Fix #334 UI failure on IE 11, add suppor for old browsers.

.babelrc

@@ -3,7 +3,13 @@
     "react",
     ["env",{
       "targets": {
-        "browsers": ["last 5 versions", "safari >= 11"],
+        "browsers": [
+          "last 5 versions", 
+          "FireFox >= 44",
+          "Safari >= 7",
+          "Explorer 11",
+          "last 4 Edge versions"
+        ],
         "loose": true
       }
     }],

package.json

@@ -55,6 +55,7 @@
     "babel-plugin-flow-runtime": "0.11.1",
     "babel-plugin-transform-decorators-legacy": "1.3.4",
     "babel-plugin-transform-runtime": "6.23.0",
+    "babel-polyfill": "^6.26.0",
     "babel-preset-env": "1.5.2",
     "babel-preset-flow": "6.23.0",
     "babel-preset-react": "6.24.1",

tools/webpack.config.js

@@ -86,7 +86,7 @@ module.exports = {
     ],
   },
 
-  devtool: isDev ? 'source-map' : 'eval',
+  devtool: isDev ? 'source-map' : false,
 
   stats: {
     children: false,

tools/webpack.prod.config.babel.js

@@ -8,7 +8,7 @@ const merge = require('webpack-merge');
 
 const prodConf = {
   entry: {
-    main: `${env.SRC_ROOT}/webui/src/index.js`,
+    main: ['babel-polyfill', `${env.SRC_ROOT}/webui/src/index.js`],
   },
 
   module: {