I have the message_highlight bling and it works, but I (well, a friend of mine who is using my Roundcube install) would like for messages he's replied to to have a highlight color in addition to the reply arrow. He's elderly and his eyes aren't quite as good as he likes to think, so he won't wear his glasses!
Anyway to do this? I have no issues with patching the roundcube code.
(still on 1.3.x as 1.4 hasn't shown up in ports for me)
NB: “bling" was a typo/autocorrect, but I liked it so I left it.