Thunderbird email GUI suggestion

[Loren2022]

There is no separation between the "subject, Correspondents, Date" line and the first new email line. This makes it too easy to mistakenly click on the top line when you are actually wanting to click on the the email line. When you make that mistake it takes a long tome to get the columbs back to normal. This is VERY annoying. Please add a gap between these two lines

[Jon]

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