[gnome-shell/wip/fmuellner/more-notification-warnings] messageTray: Disconnect signals when resetting notification

[Florian Müllner <fmuellner src gnome org>]

commit cae2d7425d2f20e31df6e95018daed08984585be
Author: Florian Müllner <fmuellner gnome org>
Date:   Tue Jan 29 15:30:40 2019 +0100

    messageTray: Disconnect signals when resetting notification
    
    Just like we did for the parent class in commit b57832716a, we should
    disconnect any notification signals when the notification is reset
    to null to avoid warnings later.
    
    https://gitlab.gnome.org/GNOME/gnome-shell/issues/942

 js/ui/messageTray.js | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)
---
diff --git a/js/ui/messageTray.js b/js/ui/messageTray.js
index 0fd739834..97452275f 100644
--- a/js/ui/messageTray.js
+++ b/js/ui/messageTray.js
@@ -497,9 +497,12 @@ class NotificationBanner extends Calendar.NotificationMessage {
         });
     }
 
-    _onDestroy() {
-        super._onDestroy();
-        this.notification.disconnect(this._activatedId);
+    _disconnectNotificationSignals() {
+        super._disconnectNotificationSignals();
+
+        if (this._activatedId)
+            this.notification.disconnect(this._activatedId);
+        this._activatedId = 0;
     }
 
     _onUpdated(n, clear) {