Bug 85774 [Presentations] bad tooltips in r21 presentation on Linux
The tooltips for the view menu and close buttons contain the "&" character on GTK.
bundles/org.eclipse.ui.presentations.r21/src/org/eclipse/ui/internal/presentations/R21BasicStackPresentation.java
viewToolBar.setVisible(true);
        paneFolder.layout(true);
        if (current != null) {
            Rectangle clientArea = paneFolder.getClientArea();
            Rectangle bounds = paneFolder.getControl().getBounds();
            clientArea.x += bounds.x;
            clientArea.y += bounds.y;
            current.setBounds(clientArea);
        }
    }
    /**
     * Returns the IPartMenu for the currently selected part, or null if the current
     * part does not have a menu.
     * 
     * @return the IPartMenu for the currently selected part or null if none
     */
    protected IPartMenu getPartMenu() {
        IPresentablePart part = getCurrentPart();
        if (part == null) {
            return null;
        }
        return part.getMenu();
    }
    /* (non-Javadoc)
     * @see org.eclipse.ui.internal.skins.Presentation#dispose()
     */
    public void dispose() {
        if (isDisposed()) {
            return;
        }