Room summary: Renaming. "last event" -> "last message"
Room summary: Renaming. "last event" -> "last message"

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