[gnome-builder] build-panel: tweak styling

[Christian Hergert <chergert src gnome org>]

commit 82231542cae3e7399b1d9e395f0da72c9fa26db6
Author: Christian Hergert <chergert redhat com>
Date:   Thu Dec 17 20:49:55 2015 -0800

    build-panel: tweak styling

 plugins/build-tools/theme/shared.css |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/plugins/build-tools/theme/shared.css b/plugins/build-tools/theme/shared.css
index 272cdb0..e5f0e08 100644
--- a/plugins/build-tools/theme/shared.css
+++ b/plugins/build-tools/theme/shared.css
@@ -11,7 +11,7 @@ buildpanel button.popup {
 
 list.buildpanel row {
   padding: 10px;
-  border-bottom: 1px solid @borders;
+  border-bottom: 1px solid alpha(@borders, 0.4);
 }
 
 list.buildpanel row:last-child {