[gnome-builder] style: tweak row styling for message popover rows

[Christian Hergert <chergert src gnome org>]

commit 9030840063b782ea24fd07c9777c02a569001f6e
Author: Christian Hergert <chergert redhat com>
Date:   Tue Sep 5 00:03:42 2017 -0700

    style: tweak row styling for message popover rows

 data/themes/Adwaita-shared.css |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/data/themes/Adwaita-shared.css b/data/themes/Adwaita-shared.css
index eecc02b..257da25 100644
--- a/data/themes/Adwaita-shared.css
+++ b/data/themes/Adwaita-shared.css
@@ -48,3 +48,6 @@ popover.messagepopover list {
   border-top: 1px solid @borders;
   border-radius: 0 0 5px 5px;
 }
+popover.messagepopover list row:not(:last-child) {
+  border-bottom: 1px solid alpha(@borders, 0.3);
+}