Bug 245670 [Preferences] Regression: Preferences dialog reveals focus widget when shell is activated
bundles/org.eclipse.ui.forms/src/org/eclipse/ui/forms/widgets/FormToolkit.java
* margin width and height must be chosen to allow the toolkit to paint the
	 * border on the parent around the widgets.
	 * <p>
	 * Borders are painted for some controls that are selected by the toolkit by
	 * default. If a control needs a border but is not on its list, it is
	 * possible to force borders in the following ways:
	 * 
	 * <pre>
	 *             widget.setData(FormToolkit.KEY_DRAW_BORDER, FormToolkit.TREE_BORDER);
	 *             
	 *             or
	 *             
	 *             widget.setData(FormToolkit.KEY_DRAW_BORDER, FormToolkit.TEXT_BORDER);
	 * </pre>
	 * <p>
	 * If borders would normally be painted for a control, but they are not wanted, it
	 * is possible to suppress them in the following way:
	 * 
	 * <pre>
	 *             widget.setData(FormToolkit.KEY_DRAW_BORDER, Boolean.FALSE);
	 * </pre>
	 * 
	 * @param parent
	 *            the parent that owns the children for which the border needs
	 *            to be painted.
	 */
	public void paintBordersFor(Composite parent) {
		
		
		if (borderPainter == null)