QmlDesigner.NodeInstances: error message if puppet does not start

If the qmlpuppet is present but does not start we need a
different error message.

Change-Id: Ifb161d9d1f0e176d5c1625f38f0c2da47a90bdf5
Reviewed-by: Marco Bubke <marco.bubke@digia.com>

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

@@ -229,7 +229,11 @@ NodeInstanceServerProxy::NodeInstanceServerProxy(NodeInstanceView *nodeInstanceV
            }
 
        } else {
-               QMessageBox::warning(0, tr("Cannot Start QML Puppet Executable"), missingQmlPuppetErrorMessage(applicationPath));
+           QMessageBox::warning(0, tr("Cannot Start QML Puppet Executable"),
+                                tr("The executable of the QML Puppet process (%1) cannot be started. "
+                                   "Please check your installation. "
+                                   "QML Puppet is a process which runs in the background to render the items.").
+                                arg(applicationPath));
        }
 
        m_localServer->close();