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
*/
    public IMenuManager getSystemMenuManager() {
        return systemMenuManager;
    }
    /**
     * @param point
     */
    protected void showSystemMenu(Point point) {
        Menu aMenu = systemMenuManager.createContextMenu(paneFolder
                .getControl().getParent());
        systemMenuManager.update(true);
        aMenu.setLocation(point.x, point.y);
        aMenu.setVisible(true);
    }
    /* (non-Javadoc)
     * @see org.eclipse.ui.internal.skins.Presentation#getControl()
     */
    public Control getControl() {
        return paneFolder.getControl();
    }
    /*
     * (non-Javadoc)
     * 
     * @see org.eclipse.ui.internal.skins.StackPresentation#dragOver(org.eclipse.swt.widgets.Control,
     *      org.eclipse.swt.graphics.Point)
     */
    public StackDropResult dragOver(Control currentControl, Point location) {
        
        Point localPos = paneFolder.getControl().toControl(location);
        final CTabItem tabUnderPointer = paneFolder.getItem(localPos);