[gnome-themes-standard] highcontrast: fix evolution column-header selectors

[Cosimo Cecchi <cosimoc src gnome org>]

commit 37a5c1c2d052053469b291254e0b987ebc932afa
Author: Cosimo Cecchi <cosimoc gnome org>
Date:   Wed Apr 25 15:15:49 2012 -0400

    highcontrast: fix evolution column-header selectors

 themes/a11y-base.css |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/themes/a11y-base.css b/themes/a11y-base.css
index ed2a9a0..e27a595 100644
--- a/themes/a11y-base.css
+++ b/themes/a11y-base.css
@@ -477,7 +477,8 @@ GtkScrolledWindow.frame {
     border-style: solid;
 }
 
-column-header .button {
+column-header .button,
+column-header.button {
     font: bold;
 
     border-top-width: 0;