Update with Valtechs changes.

git-svn-id: http://svn.igniterealtime.org/svn/repos/spark/trunk@6930 b35dd754-fafc-0310-a699-88a17e54d16e

src/java/org/jivesoftware/MainWindow.java

@@ -63,7 +63,7 @@ import javax.swing.JToolBar;
  *
  * @version 1.0, 03/12/14
  */
-public final class MainWindow extends JFrame implements ActionListener {
+public final class MainWindow extends ChatFrame implements ActionListener {
     private final Set<MainWindowListener> listeners = new HashSet<MainWindowListener>();
 
     private final JMenu connectMenu = new JMenu();