[Bug 1917142] [NEW] Thunderbird Task "Show" filtering broken

[Ted Felix]

Public bug reported:

Thunderbird in Ubuntu 20.04 LTS was just upgraded to 78.7.1.
Unfortunately, that version has a bug which renders Tasks unusable for
those of us who depend on recurring tasks.  Completed tasks keep coming
back to life on restart of Thunderbird.  This results in incessant
reminders for tasks that were completed months and months ago.

The upstream bug report is here:

https://bugzilla.mozilla.org/show_bug.cgi?id=1686466

Bug 1686466: Task "Show" filtering broken in 78.6.1 - recurring tasks
are all being marked incomplete

Thunderbird version 78.8.0 has the fix.  Hopefully an upgrade to that
version can be expedited.

** Affects: thunderbird (Ubuntu)
     Importance: Undecided
         Status: New

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Title:
  Thunderbird Task "Show" filtering broken

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