[gnome-shell/gnome-3-36] extensionSystem: Fix opening Extensions app from notification

[Florian Müllner <fmuellner src gnome org>]

commit a55203902ccea960aa37bc39c7c5e6b66981bce0
Author: Florian Müllner <fmuellner gnome org>
Date:   Tue Jan 26 17:12:04 2021 +0100

    extensionSystem: Fix opening Extensions app from notification
    
    Launching the app is implemented by the source's open() method, but
    only external notifications are hooked up to call into the source
    when no default action was provided.
    
    Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1595>
    (cherry picked from commit ddc2e0f4cb0046eac46a8ca7ddf53c39e386c3e4)

 js/ui/extensionSystem.js | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/js/ui/extensionSystem.js b/js/ui/extensionSystem.js
index 7362a00e37..b298a5acd5 100644
--- a/js/ui/extensionSystem.js
+++ b/js/ui/extensionSystem.js
@@ -252,6 +252,8 @@ var ExtensionManager = class {
             let notification = new MessageTray.Notification(source,
                 _('Extension Updates Available'),
                 _('Extension updates are ready to be installed.'));
+            notification.connect('activated',
+                () => source.open());
             source.showNotification(notification);
         }
     }