0020693: EDF 1288 SMESH: Problem to recompute a mesh with a sub-mesh and a conversion...

0020693: EDF 1288 SMESH: Problem to recompute a mesh with a sub-mesh and a conversion linear-quadratic
+  void SetIsModified(bool isModified);
+  bool GetIsModified() const { return _isModified; }
+  bool HasModificationsToDiscard() const;
+  bool                       _isModified; //!< modified since last total re-compute, issue 0020693