[Geary] Geary marking new replies to a thread as read

[Casey Stone <tcstone caseystone com>]

Hello:

Forgive me if I am incorrect about this and something else is to blame 
for it.

I'm having a problem with unread emails being marked as read when they 
are in an existing thread.

It happens when I have Geary open, possibly only when in the foreground 
or maybe any time, and I have a message thread selected and then the 
main window is showing collapsed versions of all the messages in the 
thread. If a new message comes in which belongs in that thread, it will 
be marked read immediately.

This has caused me to miss messages from people and is interfering with 
the proper functioning of email.

Geary should not mark the message as read until I click on the message 
itself, or at least scroll the window ... simply having the message 
appear at the bottom of the thread does not mean I have read it.

This just happened -- I was watching the F1 race and Geary was running 
as the foreground app on my computer, but the the computer screen was 
locked and I was not in front of it. I checked messages on my iPhone, 
this message had not loaded yet, but when it did wake up to retrieve 
the message, it appeared as already 'read'. The email server is IMAP of 
course.

Let me know if you need further description, but I've probably overdone 
it already. Thanks.

--- Geary 0.12.2 on Fedora 28 from system packages, using fairly 
standard Gnome.