[Bug 1759158] Re: Improve Thunderbird notifications for Gnome Shell

[MF]

I also experience issue 2. (on bionic) of this bug: even though messages
are read and correctly marked as read in Thunderbird window, the red
notification on Thunderbird dock icon is not updated.

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https://bugs.launchpad.net/bugs/1759158

Title:
  Improve Thunderbird notifications for Gnome Shell

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