[gnome-shell] workspaceThumbnail/thumbnailsBox: Set pivot point

[Marge Bot <marge-bot src gnome org>]

commit d368bae5034e40f8eeceda2096542f678dfc94cf
Author: Georges Basile Stavracas Neto <georges stavracas gmail com>
Date:   Wed Jan 27 12:37:48 2021 -0300

    workspaceThumbnail/thumbnailsBox: Set pivot point
    
    Set the pivot point at the center of the ThumbnailsBox so that scaling
    in and out looks better.
    
    Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1593>

 js/ui/workspaceThumbnail.js | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
---
diff --git a/js/ui/workspaceThumbnail.js b/js/ui/workspaceThumbnail.js
index d7344033c1..839ab89e43 100644
--- a/js/ui/workspaceThumbnail.js
+++ b/js/ui/workspaceThumbnail.js
@@ -1,7 +1,7 @@
 // -*- mode: js; js-indent-level: 4; indent-tabs-mode: nil -*-
 /* exported WorkspaceThumbnail, ThumbnailsBox */
 
-const { Clutter, Gio, GLib, GObject, Meta, Shell, St } = imports.gi;
+const { Clutter, Gio, GLib, GObject, Graphene, Meta, Shell, St } = imports.gi;
 
 const DND = imports.ui.dnd;
 const Main = imports.ui.main;
@@ -613,6 +613,7 @@ var ThumbnailsBox = GObject.registerClass({
             style_class: 'workspace-thumbnails',
             reactive: true,
             x_align: Clutter.ActorAlign.CENTER,
+            pivot_point: new Graphene.Point({ x: 0.5, y: 0.5 }),
         });
 
         this._delegate = this;