[gthumb] fixed comment style with gtk+ 3.16

[Paolo Bacchilega <paobac src gnome org>]

commit 49045fac8c124b11998e67f6024a84ded7bde70f
Author: Paolo Bacchilega <paobac src gnome org>
Date:   Sun Mar 29 16:48:13 2015 +0200

    fixed comment style with gtk+ 3.16

 gthumb/resources/gthumb.css |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/gthumb/resources/gthumb.css b/gthumb/resources/gthumb.css
index b434c64..1575b03 100644
--- a/gthumb/resources/gthumb.css
+++ b/gthumb/resources/gthumb.css
@@ -50,16 +50,16 @@ GthEmptyList.frame:backdrop {
 @define-color comment_bg_backdrop #c5c6ba;
 @define-color comment_border_backdrop #a5a5a5;
 
-GtkScrolledWindow.comment {
+GtkScrolledWindow.frame.comment {
        background-color: @comment_bg;
        padding: 5px 0 5px 5px;
 }
 
-GtkScrolledWindow.comment:backdrop {
+GtkScrolledWindow.frame.comment:backdrop {
        background-color: @comment_bg_backdrop;
 }
 
-GtkScrolledWindow.comment.frame {
+GtkScrolledWindow.frame.comment {
        border-color: transparent;
 }