Thread-pane + message pane intermittently do not match: especially after navigating (N to next unread) to something that wasn't in view.
I'm not sure if it's the list selection that changes (afterwards) into something wrong, or the wrong message gets shown.

Yes, the message pane seems to be changing itself only. I've got a number of issues to do with navigating that I'll fix at the same time.

• Stops the message pane navigating by itself without updating the thread pane
• When switching folders, waits for the folder to load before selecting a message
• Handles message selection better

Invalidating too many times is causing problems with navigating to the next message, and with restoring the sort order.

Depends on D170307

This isn't intended to be a complete test. I'll come back to it and add the remaining navigation actions later.

Pushed by geoff@darktrojan.net:
https://hg.mozilla.org/comm-central/rev/476d3792e1f0
follow-up - Fix broken tests. rs=bustage-fix DONTBUILD

Pushed by mkmelin@iki.fi:
https://hg.mozilla.org/comm-central/rev/8c3dfe39d2d4
Test navigation to the next [unread] message. r=mkmelin

(In reply to Pulsebot from comment #7)

Pushed by mkmelin@iki.fi:
https://hg.mozilla.org/comm-central/rev/8c3dfe39d2d4
Test navigation to the next [unread] message. r=mkmelin

you want this also on beta?

Comment on attachment 9318844 [details]
Bug 1816807 - Fix multiple issues navigating to the next message. r=#thunderbird-reviewers

[Triage Comment]
Approved for beta

Comment on attachment 9319116 [details]
Bug 1816807 - Prevent unnecessary thread tree invalidation when changing folders. r=#thunderbird-reviewers

[Triage Comment]
Approved for beta

(In reply to Wayne Mery (:wsmwk) from comment #8)

you want this also on beta?

Yes I do. And note to whoever's uplifting stuff, there was a bustage fix in this bug also. I screwed up. :-(

Thunderbird 111.0b1:
https://hg.mozilla.org/releases/comm-beta/rev/c8d88c40dcf0
https://hg.mozilla.org/releases/comm-beta/rev/e2daee0b2fb3
https://hg.mozilla.org/releases/comm-beta/rev/375138249347

Comment on attachment 9319120 [details]
Bug 1816807 - Test navigation to the next [unread] message. r=#thunderbird-reviewers

[Triage Comment]
Approved for beta
(already uplifted)

(In reply to Wayne Mery (:wsmwk) from comment #13)

(already uplifted)

It wasn't. Please uplift this patch.

Thunderbird 111.0b3:
https://hg.mozilla.org/releases/comm-beta/rev/4562dad10853