[PrivacyBadger] Privacy Badger version 2018.9.20 released

[Alexei]

Privacy Badger 2018.9.20 has been released for all supported browsers.
As always, you can get it from https://www.eff.org/privacybadger
or from your browser's add-on gallery.

Notable updates:

* Added buttons to back up and restore the disabled sites list using
Firefox/Google Sync. The new buttons live under the Manage Data tab on
the options page.
* Added saving of in-progress error reports so that you no longer lose
your typing when you close the popup for whatever reason
* Fixed popup layout problems when opened in the overflow menu in Firefox
* Updated popup and options to use a higher resolution Badger logo on
higher pixel density displays
* Fixed problems with broken fonts and images on Google Docs
* Improved translations (Traditional Chinese, French, German, Brazilian
Portuguese, Russian, Spanish, Swedish, Turkish)

For further details, consult our release notes on GitHub:
https://github.com/EFForg/privacybadger/releases/tag/release-2018.9.20