send a message will also be noted as activity

src/app.cpp

@@ -539,6 +539,7 @@ Wt::WContainerWidget* App::createSmileyBar(Wt::WContainerWidget* parent, Wt::WLi
 }
 
 Wt::WPushButton* App::createSendButton(Wt::WHBoxLayout* inputLayout, Wt::WLineEdit* inputLine) {
+    setActivity();
     auto sendButton = inputLayout->addNew<Wt::WPushButton>("Send");
     auto sendMessageFunction = [=, this]() {
         sendMessage(inputLine);