QmlDesigner: Add root item getter to ServerNodeInstance

Change-Id: I9f31390b478d8638038998682fb606dea5d1c81a
Reviewed-by: Marco Bubke <marco.bubke@digia.com>

share/qtcreator/qml/qmlpuppet/qml2puppet/instances/servernodeinstance.cpp

@@ -633,6 +633,11 @@ QList<ServerNodeInstance> ServerNodeInstance::childItems() const
     return m_nodeInstance->childItems();
 }
 
+QQuickItem *ServerNodeInstance::rootQuickItem() const
+{
+    return qobject_cast<QQuickItem*>(internalObject());
+}
+
 QString ServerNodeInstance::id() const
 {
     return m_nodeInstance->id();

share/qtcreator/qml/qmlpuppet/qml2puppet/instances/servernodeinstance.h

@@ -157,6 +157,7 @@ public:
 
     QList<ServerNodeInstance> childItems() const;
 
+    QQuickItem *rootQuickItem() const;
     QString id() const;
     qint32 instanceId() const;