[gnome-themes-standard] fix column header buttons

[William Jon McCann <mccann src gnome org>]

commit b8afd12eba0732a760147af5a8970064245bc051
Author: William Jon McCann <william jon mccann gmail com>
Date:   Tue May 6 17:21:13 2014 -0400

    fix column header buttons

 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 c50c6f4..455a8df 100644
--- a/themes/Adwaita/gtk-3.0/gtk-widgets.css
+++ b/themes/Adwaita/gtk-3.0/gtk-widgets.css
@@ -4041,6 +4041,7 @@ column-header:last-child .button:backdrop {
     border-radius: 0;
     border-style: solid;
     border-color: transparent;
+    box-shadow: none;
 }
 
 column-header.button,