Steps to reproduce:

I like a compact view. Specially on the subject column there is a unnecessary spacing.

Actual results:

More space occupied then needed

Expected results:

Make it as compact as possible

I don't expect these to change.

• The width of the attachment column is consistent other columns that have only an icon - star, spam, etc.
• The space you have indicated for the subject column is reserved for a) caret when there are multiple messages to expand and collapse a thread, and b) followup indicators reply, forward, etc

Well it has changed from the 112 version. Although there is no need for more spacing.

(In reply to mark_ivo from comment #3)

Well it has changed from the 112 version. Although there is no need for more spacing.

You mean from the 102 version?

Your last screen shot suggests that a required step is missing in comment 0, View > Sort > Unthreaded causes what you are seeing (which is not the default).

Correct. Previous version is 102. And both views has thread view disabled (my default)

But please check the comparison. Also noticed the size column is align to the right instead left. Left make more sense for the alignment of the units.

(In reply to mark_ivo from comment #6)
*Left instead of right. Right make more sense

Your last screen shot suggests that a required step is missing in comment 0, View > Sort > Unthreaded causes what you are seeing (which is not the default).

Al right, this information was missing and indeed it changes things.
Sure, we can remove the space for the chevron icon if we're in an unthreaded scenario.

Pushed by kaie@kuix.de:
https://hg.mozilla.org/comm-central/rev/23c00cbcae24
On threadTree remove the twisty space when unthreaded. r=freaktechnik

Comment on attachment 9340828 [details]
Bug 1835601 - On threadTree remove the twisty space when unthreaded. r=#thunderbird-front-end-reviewers

[Approval Request Comment]
Regression caused by (bug #): Supernova
User impact if declined: too big spacing in non-threaded mode
Testing completed (on c-c, etc.): on c-c
Risk to taking this patch (and alternatives if risky): low

Comment on attachment 9340828 [details]
Bug 1835601 - On threadTree remove the twisty space when unthreaded. r=#thunderbird-front-end-reviewers

[Triage Comment]
Approved for esr115

Thunderbird 115.0:
https://hg.mozilla.org/releases/comm-esr115/rev/309ba4a12d26