[gnome-shell-sass] Add back monitor OSD style that did not surive the sass rewrite

[Florian Müllner <fmuellner src gnome org>]

commit 48183dcf5a926e369235789981f85e206397413b
Author: Florian Müllner <fmuellner gnome org>
Date:   Sat Feb 21 15:02:50 2015 +0100

    Add back monitor OSD style that did not surive the sass rewrite

 _common.scss |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)
---
diff --git a/_common.scss b/_common.scss
index 1a6c0f8..8281dd3 100644
--- a/_common.scss
+++ b/_common.scss
@@ -493,7 +493,11 @@ StScrollBar {
   text-align: center;
   font-weight: bold;
   spacing: 1em;
+  margin: 32px;
+  min-width: 64px;
+  min-height: 64px;
 
+  .osd-monitor-label { font-size: 3em; }
   .level {
     height: 0.6em;
     border-radius: 0.3em;