WP Multi-Network was updated to version 2.2.0, from version 1.8.1. Changelogs:
2.2.0
- WordPress 4.9 minimum version bump
- Fix bug preventing sites from being moved
- Tweak some CSS styling
- Use more WordPress core functions for sites & networks
2.1.0
- Add nonce checks to forms
- Add validation & output sanitization to form fields
2.0.0
- WordPress 4.6 minimum version bump
- Caching improvements for WordPress 4.6
- Refactor list tables & admin method code