From: Daniel Kahn Gillmor <dkg@fifthhorseman.net>
Date: Sat, 9 Apr 2016 01:54:51 +0000 (-0300)
Subject: On deletion, replace with ghost when other active messages in thread
X-Git-Tag: 0.22_rc0~6
X-Git-Url: https://git.notmuchmail.org/git?p=notmuch;a=commitdiff_plain;h=1695415039803fd3b317bccbb3ceca0472bed373;hp=1695415039803fd3b317bccbb3ceca0472bed373

On deletion, replace with ghost when other active messages in thread

There is no need to add a ghost message upon deletion if there are no
other active messages in the thread.

Also, if the message being deleted was a ghost already, we can just go
ahead and delete it.
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