QmlDesigner: Split messaging and process for puppets

This will make it easier to implement custom puppets. The new connection
manager will restucture the code and it add a mechanism to capture data
too.

Task-number: QDS-2529
Change-Id: I5d15c3303ef1c9a3e25ba197d350e0d561ce813a
Reviewed-by: Thomas Hartmann <thomas.hartmann@qt.io>

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

@@ -71,6 +71,7 @@ class ServerNodeInstance
     friend class Qt5InformationNodeInstanceServer;
     friend class Qt5NodeInstanceServer;
     friend class Qt5PreviewNodeInstanceServer;
+    friend class Qt5CaptureNodeInstanceServer;
     friend class Qt5TestNodeInstanceServer;
     friend class QHash<qint32, ServerNodeInstance>;
     friend uint qHash(const ServerNodeInstance &instance);
@@ -169,6 +170,8 @@ public:
     static bool isSubclassOf(QObject *object, const QByteArray &superTypeName);
 
     void setModifiedFlag(bool b);
+    void updateDirtyNodeRecursive();
+    bool holdsGraphical() const;
 
 private: // functions
     ServerNodeInstance(const QSharedPointer<Internal::ObjectNodeInstance> &abstractInstance);
@@ -195,7 +198,6 @@ private: // functions
     void setDeleteHeldInstance(bool deleteInstance);
     void reparent(const ServerNodeInstance &oldParentInstance, const PropertyName &oldParentProperty, const ServerNodeInstance &newParentInstance, const PropertyName &newParentProperty);
 
-
     void setId(const QString &id);
 
     static QSharedPointer<Internal::ObjectNodeInstance> createInstance(QObject *objectToBeWrapped);
@@ -204,10 +206,6 @@ private: // functions
 
     void setNodeSource(const QString &source);
 
-    bool holdsGraphical() const;
-
-    void updateDirtyNodeRecursive();
-
     QObject *internalObject() const; // should be not used outside of the nodeinstances!!!!
 
 private: // variables