Semantic ui (#5507)

* semantic addition

* semantic addition

* semantic-ui into @parity/ui dependency

* Merge updates

* Update missing imports to use ~

* Clean @parity modules with clean

* Updated yarn.lock

js/src/shell/index.js

@@ -27,6 +27,8 @@ import injectTapEventPlugin from 'react-tap-event-plugin';
 import { IndexRoute, Redirect, Route, Router, hashHistory } from 'react-router';
 import qs from 'querystring';
 
+import '@parity/ui';
+
 import SecureApi from '~/secureApi';
 import ContractInstances from '~/contracts';