Fix issue with ProgressBar for loading graphs.

src/main/org/insa/graphics/GraphReaderProgressBar.java

@@ -1,7 +1,6 @@
 package org.insa.graphics;
 
 import java.awt.Component;
-import java.awt.Dimension;
 
 import javax.swing.Box;
 import javax.swing.BoxLayout;
@@ -63,13 +62,8 @@ public class GraphReaderProgressBar extends JDialog implements GraphReaderObserv
         }
 
         pane.add(Box.createVerticalGlue());
-
-        pane.setPreferredSize(new Dimension(300, 120));
-
         setContentPane(pane);
-
         pack();
-
     }
 
     @Override

src/main/org/insa/graphics/MainWindow.java

@@ -592,6 +592,10 @@ public class MainWindow extends JFrame {
                     return;
                 }
 
+                // In case of....
+                progressBar.setVisible(false);
+                progressBar = null;
+
                 String info = graph.getMapId();
                 if (graph.getMapName() != null && !graph.getMapName().isEmpty()) {
                     // The \u200e character is the left-to-right mark, we need to avoid issue with