0051789: TC7.2.0: NoteBook cannot update study

0051789: TC7.2.0: NoteBook cannot update study

-  StdMeshersGUI_LayerDistributionParamWdg(SMESH::SMESH_Hypothesis_ptr,
-                                          const QString&,
-                                          QDialog*);
+  StdMeshersGUI_LayerDistributionParamWdg(SMESH::SMESH_Hypothesis_ptr holderHyp,
+                                          SMESH::SMESH_Hypothesis_ptr distribHyp,
+                                          const QString&              name,
+                                          QDialog*                    dlg);

 private:
+ SMESH::SMESH_Hypothesis_var myHolderHyp;