title: Drag and drop in Swing is disabled when JxBrowser HEAVYWEIGHT is used
body: <p>I'm trying to get Drag and Drop to work with JxBrowser in Linux. I want in one tab to be able to drag and drop in my swing components and in another tab to have jxbrowser. However, when adding jxbrowser to another tab drag and drop stops working.</p>
  
  <p>This code reproduces the problem when trying to drag the label in the "Text" tab`:</p>
  
  <pre><code>public class TabbedPaneSample {
     public static void main(String[] args) {
          Browser browser = new Browser(BrowserType.HEAVYWEIGHT);
  
          JLabel label = new JLabel("Label Text");
          label.setTransferHandler(new TransferHandler("text"));
          label.addMouseListener(new MouseAdapter() {
              public void mousePressed(MouseEvent evt) {
                  JComponent comp = (JComponent) evt.getSource();
                  TransferHandler th = comp.getTransferHandler();
                  th.exportAsDrag(comp, evt, TransferHandler.COPY);
              }
          });
  
          JTabbedPane tabbedPane = new JTabbedPane();
          tabbedPane.addTab("Browser", new BrowserView(browser));
          tabbedPane.addTab("Text", label);
  
          JFrame frame = new JFrame();
          frame.getContentPane().add(tabbedPane, BorderLayout.CENTER);
          frame.setSize(800, 600);
          frame.setVisible(true);
          frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  
          browser.loadURL("https://www.google.com");
      }
  }
  </code></pre>
  
  <p>Changing <code>BrowserType.HEAVYWEIGHT</code> to <code>BrowserType.LIGHTWEIGHT</code> makes it work.</p>
  
  <p>Can I somehow work around this problem?</p>