[gnome-themes-standard] HighContrast: add missing selector for image-button classes

[Cosimo Cecchi <cosimoc src gnome org>]

commit 7c24d5113eca876d3f66e971983ce6b0b445bca6
Author: Cosimo Cecchi <cosimoc gnome org>
Date:   Mon Sep 2 21:50:32 2013 -0700

    HighContrast: add missing selector for image-button classes

 themes/HighContrast/gtk-3.0/gtk-widgets.css |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)
---
diff --git a/themes/HighContrast/gtk-3.0/gtk-widgets.css b/themes/HighContrast/gtk-3.0/gtk-widgets.css
index 92b8e7c..c58b4c1 100644
--- a/themes/HighContrast/gtk-3.0/gtk-widgets.css
+++ b/themes/HighContrast/gtk-3.0/gtk-widgets.css
@@ -277,6 +277,10 @@ GtkLevelBar.vertical {
     color: @theme_button_fg;
 }
 
+.button.image-button {
+    padding: 5px;
+}
+
 .button:active {
     background-color: @theme_button_active_bg;
     color: @theme_base_color;