Implement Notification warning when user doesn't have latest version

[mneunomne]

On Chromium browsers where auto-update is not available (all except edge as of Dec 2023), notification should appear linking to latest version page.

[mneunomne]

Implemented when:

• is chromium browser
• not edge
• not beta version

[mneunomne]

Closing, implemented. But important to check again before making new release.