Thunderbird: Highlight row on focus

I use the keyboard a lot.  For many years now, Thunderbird’s default theme (probably inherited from the desktop, which does the same thing on many dialogues) has had a little quirk that is slightly less conducive to keyboard use: It does not highlight the row with focus.  Here is an example:

This way, I cannot tell what . . . → Read More: Thunderbird: Highlight row on focus