Moving previews to client side rendering for consistency

frontend/components/Editor/components/Code.js

@@ -0,0 +1,13 @@
+// @flow
+import React from 'react';
+import type { Props } from '../types';
+
+export default function Code({ children, attributes }: Props) {
+  return (
+    <pre>
+      <code {...attributes}>
+        {children}
+      </code>
+    </pre>
+  );
+}