Steps to reproduce
==================
This only seem to happen on Firefox
- Go to Email Marketing
- Open a campaign
- Go back to the homepage by using the topleft square button
-> `$(...).offset() is undefined`
Cause of the issue
==================
The ResizeObserver used in MassMailingFullWidthViewController is still
triggered, even though it shoudln't.
Solution
========
Disconnect the observer when the component is unmounted.
opw-3271101
closesodoo/odoo#118785
X-original-commit: d5f6bc2b33c3b83520ed2ed710610b69dbe67b75
Signed-off-by: Hubert Van De Walle <huvw@odoo.com>
Hubert Van de Walle (huvw)
a6d65cac43