Handle iOS 12 grouped notifications. Group by room id.
Handle iOS 12 grouped notifications. Group by room id.

vector-im/riot-ios,vector-im/riot-ios,vector-im/vector-ios,vector-im/riot-ios,vector-im/vector-ios,vector-im/riot-ios,vector-im/riot-ios,vector-im/vector-ios,vector-im/riot-ios