[gthumb] fixed comment style with gtk+ 3.16 and previous versions

[Paolo Bacchilega <paobac src gnome org>]

commit da5f7169a3d042dae56397221df9731c038bb073
Author: Paolo Bacchilega <paobac src gnome org>
Date:   Sun Mar 29 21:25:17 2015 +0200

    fixed comment style with gtk+ 3.16 and previous versions

 gthumb/resources/gthumb.css |   14 +++++++++++---
 1 files changed, 11 insertions(+), 3 deletions(-)
---
diff --git a/gthumb/resources/gthumb.css b/gthumb/resources/gthumb.css
index df14858..f6876c6 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.frame.comment {
+GtkScrolledWindow.comment {
        background-color: @comment_bg;
        padding: 5px 0 5px 5px;
 }
 
-GtkScrolledWindow.frame.comment:backdrop {
+GtkScrolledWindow.comment:backdrop {
        background-color: @comment_bg_backdrop;
 }
 
-GtkScrolledWindow.frame.comment {
+GtkScrolledWindow.comment.frame {
        border-color: transparent;
 }
 
@@ -79,6 +79,14 @@ GtkScrolledWindow.comment .scrollbar.slider:backdrop {
        background-color: @comment_border_backdrop;
 }
 
+GtkScrolledWindow.comment.overshoot {
+       background-color: transparent;
+}
+
+GtkScrolledWindow.comment.undershoot {
+       background-color: transparent;
+}
+
 .comment .view,
 .comment.view {
        background-color: @comment_bg;