Add help without any content

[MAILPOET-949]

assets/js/src/help/help.jsx

@@ -0,0 +1,34 @@
+import React from 'react'
+import ReactDOM from 'react-dom'
+import { Router, Route, IndexRedirect, useRouterHistory } from 'react-router'
+import { createHashHistory } from 'history'
+
+import KnowledgeBase from 'help/knowledge_base.jsx'
+import SystemInfo from 'help/system_info.jsx'
+
+const history = useRouterHistory(createHashHistory)({ queryKey: false });
+
+const App = React.createClass({
+  render() {
+    return this.props.children;
+  }
+});
+
+const container = document.getElementById('mailpoet_help');
+
+if(container) {
+
+  const mailpoet_listing = ReactDOM.render((
+    <Router history={ history }>
+      <Route path="/" component={ App }>
+        <IndexRedirect to="knowledgeBase" />
+        {/* Listings */}
+        <Route path="knowledgeBase(/)**" params={{ tab: 'knowledgeBase' }} component={ KnowledgeBase } />
+        <Route path="systemInfo(/)**" params={{ tab: 'systemInfo' }} component={ SystemInfo } />
+
+      </Route>
+    </Router>
+  ), container);
+
+  window.mailpoet_listing = mailpoet_listing;
+}