[gnome-shell-extensions/wip/rstrode/heads-up-display] fixup!heads-up-display: Add extension for showing persistent heads up display message

[Ray Strode <halfline src gnome org>]

commit 11b2702aab24997e7ed5b81b22ce6c9788d7c2c2
Author: Florian Müllner <fmuellner gnome org>
Date:   Wed Sep 29 18:03:08 2021 +0000

    fixup!heads-up-display: Add extension for showing persistent heads up display message

 extensions/heads-up-display/extension.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/extensions/heads-up-display/extension.js b/extensions/heads-up-display/extension.js
index 295983d..3365425 100644
--- a/extensions/heads-up-display/extension.js
+++ b/extensions/heads-up-display/extension.js
@@ -71,7 +71,7 @@ class Extension {
         this._settings = ExtensionUtils.getSettings('org.gnome.shell.extensions.heads-up-display');
         this._settingsChangedId = this._settings.connect('changed', this._updateMessage.bind(this));
 
-        this._idleMonitor = Meta.IdleMonitor.get_core();
+        this._idleMonitor = global.backend.get_core_monitor();
         this._messageInhibitedUntilIdle = false;
         this._oldMapWindow = Main.wm._mapWindow;
         Main.wm._mapWindow = this._mapWindow;