chatgui: fix RTT display 10x overstatement (DB stores 0.1ms, displayed as ms); remove unused rtt_avg_100

tools/chatgui/src/nodespage.cpp

@@ -217,7 +217,7 @@ void NodesPage::refreshNodes() {
                         .arg(port)
                         .arg(protoStr(proto))
                         .arg(addrTypeStr(addrType))
-                        .arg(rtt > 0 ? QString::number(rtt) : "-");
+                        .arg(rtt > 0 ? QString::number(rtt / 10) : "-");
                 }
                 ac++;
             }