On Thu, 07 Feb 2013 20:15:07 +0100, Thomas Bruederli
> Hello again
> 
> First of all, thank you for all the feedback you sent in! I could see some
> clear features many of you mentioned and some of them are even already
> registered as feature request tickets.

I'm still on an old version because I don't have the time/inclination to push some patches forward that will probably have to be rediffed quite a bit for the latest version.

This patch provides a visual representation of a collapsed thread which contains unread messages. It also provides a visual representation for a collapsed thread which contains flagged messages.

http://trac.roundcube.net/ticket/1486701

I had also created a "flagged children" icon which is analogous to the one for unread children. 

http://trac.roundcube.net/attachment/ticket/1486904/flagged_children.png

Screenshots:

Here is an expanded thread with an unread message and a flagged message. No surprises here:




Now here is what it looks like when you collapse it and the patch kicks in:




The patch which is in Trac will not show this exact appearance, because the hollow blue star is the "unread_children.png" from the RoundCube distribution which I found.  You guys made the icon, but left it unused!

The hollow yellow star is the flagged_children.png which I created, analogous to the hollow blue star.

The hollow icons are nice because they tell you, it is not necessarily this specific message which is flagged or unread, but something in the collapsed thread which is represented by this message.

My mail.html template is patched like this:

 --- roundcube.orig/skins/default/templates/mail.html    2010-08-23
09:42:41.0000
00000 -0700
+++ roundcube/skins/default/templates/mail.html 2010-08-23
09:42:43.000000000 -0
700
@@ -67,7 +67,8 @@
   attachmentIcon="/images/icons/attachment.png"
   flaggedIcon="/images/icons/flagged.png"
   unflaggedIcon="/images/icons/blank.gif"
-  unreadchildrenIcon=""
+  unreadchildrenIcon="/images/icons/unread_children.png"
+  flaggedchildrenIcon="/images/icons/flagged_children.png"
   optionsmenuIcon="/images/icons/columnpicker.gif" />