Bug Info:
=========
Tab title is enabled while rollover on disabled tab title in tabbedpane.

Scenario:
=========
1. Run the below source code
2. Move the mouse over the disabled tab title.

Expected result:
================
Should not show any effect in the tab title.

Actual result:
==============
Tab title changes to enabled state while rollover on disabled tab title.


Source code:
===========
import javax.swing.*;
import java.awt.*;

public class TabbedPaneTest extends JFrame {

        JTabbedPane tabbedPane;
        JPanel panel;

        TabbedPaneTest() {
           try{
                UIManager.setLookAndFeel("com.sun.java.swing.plaf.gtk.GTKLookAndFeel");
                tabbedPane = new JTabbedPane();
                tabbedPane.addTab("Tab 1", new JLabel("TabbedPane Test - Tab 1", JLabel.CENTER));
                tabbedPane.addTab("Tab 2", new JLabel("TabbedPane Test - Tab 2", JLabel.CENTER));
                tabbedPane.addTab("Tab 3", new JLabel("TabbedPane Test - Tab 3", JLabel.CENTER));
                tabbedPane.addTab("Tab 4", new JLabel("TabbedPane Test - Tab 4", JLabel.CENTER));
                tabbedPane.addTab("Tab 5", new JLabel("TabbedPane Test - Tab 5", JLabel.CENTER));
                tabbedPane.setEnabled(false);
               panel = new JPanel();
               panel.add(tabbedPane);
               setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
               Dimension screenSize = java.awt.Toolkit.getDefaultToolkit().getScreenSize();
               setBounds((screenSize.width-493)/2, (screenSize.height-388)/2, 493, 388);
               getContentPane().add(tabbedPane, java.awt.BorderLayout.CENTER);
               setVisible(true);

          }catch(Exception exp){
          }
        }

      public static void main(String [] args){
            new TabbedPaneTest();
     }

}