QmlDesigner: Reset puppet alive timer when connection is cleared

It is simpler to just recreate the timer than reuse the existing one.

Change-Id: I50a8507a69b83917ff522bb5ae472285135c351c
Fixes: QDS-3026
Reviewed-by: Marco Bubke <marco.bubke@qt.io>
Reviewed-by: Thomas Hartmann <thomas.hartmann@qt.io>
Reviewed-by: Mahmoud Badri <mahmoud.badri@qt.io>

src/plugins/qmldesigner/designercore/instances/connectionmanagerinterface.cpp

@@ -38,7 +38,6 @@ ConnectionManagerInterface::Connection::~Connection() = default;
 ConnectionManagerInterface::Connection::Connection(const QString &name, const QString &mode)
     : name{name}
     , mode{mode}
-    , timer{std::make_unique<QTimer>()}
 {}
 
 ConnectionManagerInterface::Connection::Connection(Connection &&connection) = default;
@@ -49,7 +48,7 @@ void ConnectionManagerInterface::Connection::clear()
     socket.reset();
     blockSize = 0;
     lastReadCommandCounter = 0;
-    timer->stop();
+    timer.reset();
 }
 
 } // namespace QmlDesigner

src/plugins/qmldesigner/designercore/instances/interactiveconnectionmanager.cpp

@@ -52,8 +52,10 @@ void InteractiveConnectionManager::setUp(NodeInstanceServerInterface *nodeInstan
 
     DesignerSettings settings = QmlDesignerPlugin::instance()->settings();
     int timeOutTime = settings.value(DesignerSettingsKey::PUPPET_KILL_TIMEOUT).toInt();
-    for (Connection &connection : connections())
+    for (Connection &connection : connections()) {
+        connection.timer.reset(new QTimer);
         connection.timer->setInterval(timeOutTime);
+    }
 
     if (QmlDesignerPlugin::instance()
             ->settings()