[Behavior] Turn off phone notifications when Desktop Telegram is active

[LonnyX]

Steps to reproduce

1. Open Telegram desktop and mobile
2. Ask a friend send you a message
3. Receive the notifications on both platforms at the same time, which is not cool!

Expected behaviour

If desktop app is active, mobile should not receive notifications (A lot of apps are already using this priority)

Actual behaviour

Receive notifications on all platforms

Configuration

MacOS & iOS

Version of Telegram Desktop:
All versions are affected

[MarcAnt01]

Telegram Desktop uses in-app notifications, iOS uses push notifications. Telegram Desktop can do nothing about that

[RememberTheAir]

Duplicate of #277

[github-actions]

This issue has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.