ENH: Written dataset descriptor when clicked save button of confirm dialog.

Code/Application/mvdMainWindow.cxx

@@ -400,6 +400,7 @@ MainWindow::closeEvent( QCloseEvent* event )
   switch( clickedButton )
     {
     case QMessageBox::Save:
+      model->Save();
       break;
 
     case QMessageBox::Discard:

Code/Common/mvdDatasetModel.cxx

@@ -270,6 +270,14 @@ DatasetModel
   return false;
 }
 
+/*******************************************************************************/
+void
+DatasetModel
+::Save() const
+{
+  WriteDescriptor();
+}
+
 /*******************************************************************************/
 /* SLOTS                                                                       */
 /*******************************************************************************/

Code/Common/mvdDatasetModel.h

@@ -152,6 +152,10 @@ public:
    */
   inline ConstAbstractImageModelList GetImageModels() const;
 
+  /**
+   */
+  void Save() const;
+
   //
   // AbstractModel overrides.