chatRoster state / subscription request lost if app not running

[prographo]

If subscription request is sent from user A to user B while B is offline (phone is off), then that request is lost.

Everything works if the app is in a background state, but if the app is not running, then the request is lost.

[RomanPronin]

In Qmun used logic with PROPERTY_NOTIFICATION_TYPE with FRIENDS_REQUEST value for chat message. Just look at code and explore it.