BrowserWindowOpener and shortcut keys

Hi,

Shortcut key does not work for a Button associated with BrowserWindowOpener.
Can anyone help me here?
Thanks in advance.

Following is code for reference:

Shortcut “KeyCode.A, ModifierKey.CTRL,ModifierKey.ALT” which is set to regular button works fine.
Whereas nothing happens with “KeyCode.B, ModifierKey.CTRL,ModifierKey.ALT” shortcut which is set to button associated with BrowserWindowOpener.

import com.vaadin.annotations.Theme;
import com.vaadin.event.ShortcutAction.KeyCode;
import com.vaadin.event.ShortcutAction.ModifierKey;
import com.vaadin.server.BrowserWindowOpener;
import com.vaadin.server.VaadinRequest;
import com.vaadin.ui.Button;
import com.vaadin.ui.Button.ClickEvent;
import com.vaadin.ui.Label;
import com.vaadin.ui.UI;
import com.vaadin.ui.VerticalLayout;

@SuppressWarnings("serial")
@Theme("demo")
public class DemoUI extends UI {

    @Override
    protected void init(VaadinRequest request) {
        final VerticalLayout layout = new VerticalLayout();
        layout.setMargin(true);
        setContent(layout);

        Button button = new Button("Click Me");
        button.addClickListener(new Button.ClickListener() {
            public void buttonClick(ClickEvent event) {
                layout.addComponent(new Label("Thank you for clicking"));
            }
        });

        //
        BrowserWindowOpener opener = new BrowserWindowOpener("https://www.google.com/");
        opener.setFeatures("height=200,width=300,resizable");

        // Attach BrowserWindowOpener to a button
        Button browserWindowOpenerButton = new Button("Pop It Up");
        opener.extend(browserWindowOpenerButton);

        //Set Click Shortcuts for buttons
        button.setClickShortcut(KeyCode.A, ModifierKey.CTRL,ModifierKey.ALT);
        browserWindowOpenerButton.setClickShortcut(KeyCode.B, ModifierKey.CTRL,ModifierKey.ALT);

        //add buttons to layout
        layout.addComponent(button);
        layout.addComponent(browserWindowOpenerButton);
    }
}

Regards,
Kunal Patil