Wip: Separated cretion of Qwt classes from Rim construction

This needs to be done because MDI window close window deletes the widgets.
We need to be able to recreate all the widgets/qwt objects when needed.
The QwtPlotCurves still crashes on window close/open

ApplicationCode/ProjectDataModel/RimWellLogPlotTrace.h

@@ -44,6 +44,7 @@ public:
     void addCurve(RimWellLogPlotCurve* curve);
     size_t curveCount() { return curves.size(); }
 
+    void recreateViewer();
     void loadDataAndUpdate();
 
     bool availableDepthRange(double* minimumDepth, double* maximumDepth);
@@ -54,7 +55,6 @@ protected:
 
     // Overridden PDM methods
     virtual void fieldChangedByUi(const caf::PdmFieldHandle* changedField, const QVariant& oldValue, const QVariant& newValue);
-    virtual void initAfterRead();
     virtual caf::PdmFieldHandle* objectToggleField();
 
 private: