Changelog: 🚀

## New feature

**Section isolated mode:** now you can open sections in isolated mode too.

(#394 by @Knorcedger)

## Bug fixes

* Fix React CodeMirror warning when opening code editor
* Fix Create React App 1.0 support (#458)
* Fix back button path for support pathname-relative paths (#447 by @stepancar)
* Promise polyfill for IE11 because require.ensure requires it in webpack 2

Author: sapegin