[gnome-shell] dialog: Return GLib.SOURCE_REMOVE instead of false

[Florian Müllner <fmuellner src gnome org>]

commit 0ff75941ead611154a4a45e18576939b35f52679
Author: Jonas Dreßler <verdre v0yd nl>
Date:   Sun Jun 28 13:06:50 2020 +0200

    dialog: Return GLib.SOURCE_REMOVE instead of false
    
    This is more readable than just returning false.
    
    https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1336

 js/ui/dialog.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/js/ui/dialog.js b/js/ui/dialog.js
index 8e9fb50908..e7d462f451 100644
--- a/js/ui/dialog.js
+++ b/js/ui/dialog.js
@@ -1,7 +1,7 @@
 // -*- mode: js; js-indent-level: 4; indent-tabs-mode: nil -*-
 /* exported Dialog, MessageDialogContent, ListSection, ListSectionItem */
 
-const { Clutter, GObject, Meta, Pango, St } = imports.gi;
+const { Clutter, GLib, GObject, Meta, Pango, St } = imports.gi;
 
 function _setLabel(label, value) {
     label.set({
@@ -221,7 +221,7 @@ var MessageDialogContent = GObject.registerClass({
             this._updateTitleStyleLater = Meta.later_add(Meta.LaterType.BEFORE_REDRAW, () => {
                 this._updateTitleStyleLater = 0;
                 this._title.add_style_class_name('leightweight');
-                return false;
+                return GLib.SOURCE_REMOVE;
             });
         }