Thunderbird v. 128 folder pane line spacing

[skabaw]

How to decrease the line spacing in the folder pane of Thunderbird v. 128? I've already managed to decrease the spacing in the message pane, by adding to userChrome.css this:

tr[is="thread-row"] {
height: 16px !important;
}

However, all attempts to do the same in the folder pane had failed. I've learned that I can increase the line spacing by:

#folderPane {
line-height: 30px !important;
}

But decreasing it below a threshold, like 10px, actually truncates the text from the bottom rather than decreases the spacing. There must be another variable like padding, margin, min-height or smth. that stops me from decreasing the vertical spacing.

[tap836]

I found something elsewhere that said to use this to reduce the folder pane spacing.  It appears to work perfectly for me.

:root {
--list-item-min-height: 10px !important;
--list-item-buttons-size: 10px !important;
}