[gnome-themes-standard] Widgets: remove drop shadow from tab close icon in backdrop state.

[Lapo Calamandrei <lapo src gnome org>]

commit 3c713340b0a1bcfb565895de8e6b1dae3ecd9922
Author: Lapo Calamandrei <calamandrei gmail com>
Date:   Fri Feb 3 19:17:33 2012 +0100

    Widgets: remove drop shadow from tab close icon in backdrop state.

 themes/Adwaita/gtk-3.0/gtk-widgets.css |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/themes/Adwaita/gtk-3.0/gtk-widgets.css b/themes/Adwaita/gtk-3.0/gtk-widgets.css
index b2b4224..f20d885 100644
--- a/themes/Adwaita/gtk-3.0/gtk-widgets.css
+++ b/themes/Adwaita/gtk-3.0/gtk-widgets.css
@@ -1051,6 +1051,7 @@ GtkLinkButton * {
 
 .notebook tab .button GtkImage:backdrop {
     color: mix(@theme_unfocused_fg_color, @theme_unfocused_base_color, 0.7); /* FIXME*/
+    icon-shadow: none;
 }
 
 .notebook tab .button GtkImage:backdrop:hover {