0020918: EDF 1447 SMESH: Mesh common borders

1) NotifySubMeshesHypothesisModification() in LoadFrom()
2) +  virtual void  UpdateAsMeshesRestored(); // for hyps needing full data restored

src/SMESH_I/SMESH_Hypothesis_i.cxx

@@ -279,4 +279,17 @@ void SMESH_Hypothesis_i::LoadFrom( const char* theStream )
   MESSAGE( "SMESH_Hypothesis_i::LoadFrom" );
   std::istringstream is( theStream );
   myBaseImpl->LoadFrom( is );
+  // let listeners know about loading (issue 0020918)
+  myBaseImpl->NotifySubMeshesHypothesisModification();
+}
+
+//================================================================================
+/*!
+ * \brief This mesthod is called after completion of loading a study 
+ */
+//================================================================================
+
+void SMESH_Hypothesis_i::UpdateAsMeshesRestored()
+{
+  // for hyps needing full data restored
 }

src/SMESH_I/SMESH_Hypothesis_i.hxx

@@ -91,7 +91,8 @@ public:
   // Persistence
   virtual char* SaveTo();
   virtual void  LoadFrom( const char* theStream );
-  
+  virtual void  UpdateAsMeshesRestored(); // for hyps needing full data restored
+
 protected:
   ::SMESH_Hypothesis* myBaseImpl;    // base hypothesis implementation
 };