[baobab] Ringschart: copy tooltip style from Adwaita

[Stefano Facchini <sfacchini src gnome org>]

commit 4302da9c3a3d1e49886f8e8b07fbcd77ffa27802
Author: Stefano Facchini <stefano facchini gmail com>
Date:   Thu Sep 11 10:16:47 2014 +0200

    Ringschart: copy tooltip style from Adwaita

 src/baobab.css |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/src/baobab.css b/src/baobab.css
index b2ee94c..02b112c 100644
--- a/src/baobab.css
+++ b/src/baobab.css
@@ -70,6 +70,7 @@ BaobabRingschart {
 }
 
 BaobabRingschart.subfolder-tip {
+    background-color: rgba(0, 0, 0, 0.8);
     padding: 3px 3px 3px 3px;
 }