[gnome-shell] Revert "signalTracker: Use WeakMap in SignalManager to avoid leaking objects"

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

commit d57953ad94ef8b58bb37c5d1fc9e6a34f30778ed
Author: Sebastian Keller <skeller gnome org>
Date:   Fri Sep 2 18:37:13 2022 +0200

    Revert "signalTracker: Use WeakMap in SignalManager to avoid leaking objects"
    
    This reverts commit 085102be74f4c98094712a165e5128feaca50438.
    
    We need the SignalManager map top be iterable at shutdown for some of
    the following changes. A WeakMap is not iterable. This revert changes it
    back to a regular Map, which re-introduces the leaks caused by this.
    Those will be fixed differently by the two followup commits.
    
    Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/2466>

 js/misc/signalTracker.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/js/misc/signalTracker.js b/js/misc/signalTracker.js
index 8444564df4..1c3f4f9df4 100644
--- a/js/misc/signalTracker.js
+++ b/js/misc/signalTracker.js
@@ -42,7 +42,7 @@ class SignalManager {
     }
 
     constructor() {
-        this._signalTrackers = new WeakMap();
+        this._signalTrackers = new Map();
     }
 
     /**