EditEmailSubject-hotfix ਮੁੜ ਤੋਂ ਚਾਲੂ ਕਰਨ ਦੀ ਲੋੜ ਹੈ

Hotfix for EditEmailSubject version 2.1.0 by jisse44
https://addons.mozilla.org/de/thunderbird/addon/edit-email-subject/

- fixed: does not overwrite Message-ID and references with undefined