Bug 1405542 changed a bit in the tabs in titlebar code which we can follow.
We need only to port the msgMail3PaneWindow.js changes from bug 1405542. The other parts aren't needed as we have this implemented differently with our two toolboxes. I ported this!https://hg.mozilla.org/integration/autoland/rev/f5121cba7d7b#l1.12
Assignee: nobody → richard.marti
Status: NEW → ASSIGNED
Attachment #8921605 - Flags: review?(jorgk)
Comment on attachment 8921605 [details] [diff] [review] msgMail3PaneWindow.js.patch I need a patch to land at midnight. I haven't tried it, but you promise that it works, right? Bug 1405542 will get merged tonight, but we don't need it for this to work.
Attachment #8921605 - Flags: review?(jorgk) → review+
Yes, I tested it on Win10 and macOS. Linux isn't affected because it can't draw into the titlebar.
Pushed by firstname.lastname@example.org: https://hg.mozilla.org/comm-central/rev/e0ae6f37195d Follow the changes of bug 1405542 in msgMail3PaneWindow.js. r=jorgk
Status: ASSIGNED → RESOLVED
Closed: 3 years ago
Resolution: --- → FIXED
Target Milestone: --- → Thunderbird 58.0
Version: unspecified → Trunk
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