UI 2 tests & webpack dapp build updates/fixes (#5561)

* Tests are executing again

* Fix tests

* Add missing contextTypes

* IdentityIcon without Connect()

* Update ~/ui tests

* Update spec locations

* Filename case

* Fix playground dapp build

js/webpack/rules/es6.js

@@ -16,6 +16,6 @@
 
 module.exports = {
   test: /\.js$/,
-  include: /node_modules\/(material-chip-input|ethereumjs-tx)/,
+  include: /node_modules\/(get-own-enumerable-property-symbols|material-chip-input|ethereumjs-tx|stringify-object)/,
   use: 'babel-loader'
 };