Support GNOME Shell 48

[jbicha]

Describe the bug

Please add support for GNOME Shell 48.

I tried updating the metadata.json myself but got this error when activating the extension

TypeError: class heritage Calendar.NotificationMessage is not an object or null

See also https://gjs.guide/extensions/upgrading/gnome-shell-48.html

Steps to reproduce

No response

Expected behavior

No response

GSConnect version

58-1

Installed from

OS package manager

GNOME Shell version

48

Linux distribution/release

Ubuntu 25.04 or Debian Unstable

Paired device(s)

No response

KDE Connect app version

No response

Plugin(s)

No response

Support log

Screenshots

No response

Notes

No response

[ant2a]

The NotificationMessage widget was moved from calendar.js to messageList.js. I've fixed the import and that seems to solve the problem.

I'm not quite sure how to avoid breaking compatibility with older shell versions (I'm not really a JS developer).