[gnome-shell-sass] Update pad OSD style

[Florian Müllner <fmuellner src gnome org>]

commit 50bbd0b50ff81d2a6d8441d79ac9e7be64517bb8
Author: Florian Müllner <fmuellner gnome org>
Date:   Fri Nov 4 16:42:22 2016 +0100

    Update pad OSD style
    
    The second parameter to transparentize() is the amount of additional
    transparency - that is, it is subtracted from, not multiplied with the
    current opacity.

 _common.scss |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/_common.scss b/_common.scss
index 31bd040..f192ce7 100644
--- a/_common.scss
+++ b/_common.scss
@@ -625,7 +625,7 @@ StScrollBar {
 /* Pad OSD */
 .pad-osd-window {
     padding: 32px;
-    background-color: transparentize(black, 0.8);
+    background-color: transparentize(black, 0.2);
 }
 
 .combo-box-label {