[gnome-shell-sass] calendar: Add "Do Not Disturb" switch

[Florian Müllner <fmuellner src gnome org>]

commit 7fcf080601c14b3a7c0d1bc5adf978988ad30131
Author: Florian Müllner <fmuellner gnome org>
Date:   Fri May 4 17:55:29 2018 +0200

    calendar: Add "Do Not Disturb" switch
    
    We've had the ability to temporarily disable notification banners
    all the way back to 3.0, but we stopped exposing it in the UI with
    the 3.16 notification redesign. With the message list being more
    concise nowadays and the "Clear" button reduced to a single icon,
    we now have space for a "Do Not Disturb" switch again.
    
    https://gitlab.gnome.org/GNOME/gnome-shell/issues/239

 widgets/_message-list.scss | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)
---
diff --git a/widgets/_message-list.scss b/widgets/_message-list.scss
index 1b570c8..bc80c3f 100644
--- a/widgets/_message-list.scss
+++ b/widgets/_message-list.scss
@@ -24,9 +24,10 @@
   &:rtl {padding:0;}
 }
 
-// clear button
-.message-list-clear-button.button {
-  margin:$base_margin $base_margin*2;
+// do-not-disturb + clear button
+.message-list-controls {
+  margin: $base_margin $base_margin*2;
+  spacing: $base_spacing;
 }
 
 // message bubbles