Fix isInternalUrl for subdomain support

Refactor / reduce plumbing

app/components/Labeled.js

@@ -0,0 +1,28 @@
+// @flow
+import * as React from 'react';
+import { observer } from 'mobx-react';
+import Flex from 'shared/components/Flex';
+import styled from 'styled-components';
+
+type Props = {
+  label: React.Node | string,
+  children: React.Node,
+};
+
+const Labeled = ({ label, children, ...props }: Props) => (
+  <Flex column {...props}>
+    <Label>{label}</Label>
+    {children}
+  </Flex>
+);
+
+export const Label = styled(Flex)`
+  margin-bottom: 8px;
+  font-size: 13px;
+  font-weight: 500;
+  text-transform: uppercase;
+  color: #9fa6ab;
+  letter-spacing: 0.04em;
+`;
+
+export default observer(Labeled);