[gnome-themes-standard] Make the bottom borders of reorderable tabs not look like trapezoids

[Jakub Steiner <jimmac src gnome org>]

commit e35d5fb04e80a85f6ddfc3743ebf3dcf4bca152f
Author: Nikita Churaev <lamefun x0r gmail com>
Date:   Sat May 3 21:13:13 2014 +0400

    Make the bottom borders of reorderable tabs not look like trapezoids
    
    The junctions between borders are rendered slanted by CSS. Replaced left and right borders by inset 
shadows.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=729465

 themes/Adwaita/gtk-3.0/gtk-widgets.css |   16 ++++++++++------
 1 files changed, 10 insertions(+), 6 deletions(-)
---
diff --git a/themes/Adwaita/gtk-3.0/gtk-widgets.css b/themes/Adwaita/gtk-3.0/gtk-widgets.css
index 56a4117..836f898 100644
--- a/themes/Adwaita/gtk-3.0/gtk-widgets.css
+++ b/themes/Adwaita/gtk-3.0/gtk-widgets.css
@@ -1909,15 +1909,19 @@ GtkLinkButton.button:active {
 
 .notebook tab.reorderable-page:hover {
     background-color: shade(@theme_bg_color, 0.97);
-    box-shadow: inset 0 3px alpha(black, 0.03), inset 0 2px alpha(black, 0.03), inset 0 1px alpha(black, 
0.03);
-    border-left: 1px solid shade (@borders, 1.25);
-    border-right: 1px solid shade (@borders, 1.25);
+    /* using box shadows instead of borders due to slanted edges */
+    box-shadow: inset 0 3px alpha(black, 0.03), inset 0 2px alpha(black, 0.03), inset 0 1px alpha(black, 
0.03),
+                inset 1px 0 shade (@borders, 1.25), inset -1px 0 shade (@borders, 1.25);
+    border-left: 0;
+    border-right: 0;
 }
+
 .notebook tab.reorderable-page:active {
     background-color: @theme_bg_color;
-    box-shadow: inset 0 3px alpha(black, 0.03), inset 0 2px alpha(black, 0.03), inset 0 1px alpha(black, 
0.03);
-    border-left: 1px solid shade (@borders, 1.2);
-    border-right: 1px solid shade (@borders, 1.2);
+    box-shadow: inset 0 3px alpha(black, 0.03), inset 0 2px alpha(black, 0.03), inset 0 1px alpha(black, 
0.03),
+                inset 1px 0 shade (@borders, 1.2), inset -1px 0 shade (@borders, 1.2);
+    border-left: 0;
+    border-right: 0;
 }
 
 /* close button styling */