Bug 239300 [TabbedProperties] underline missing from tab label when tab has focus
bundles/org.eclipse.ui.views.properties.tabbed/src/org/eclipse/ui/internal/views/properties/tabbed/view/TabbedPropertyList.java
private int tabsThatFitInComposite = NONE;
	private Color widgetForeground;
	private Color widgetBackground;
	private Color widgetNormalShadow;
	private Color widgetDarkShadow;
	private Color listBackground;
	private Color hoverGradientStart;
	private Color hoverGradientEnd;
	private Color defaultGradientStart;
	private Color defaultGradientEnd;
	private Color indentedDefaultBackground;
	private Color indentedHoverBackground;
	private Color navigationElementShadowStroke;
	private Color bottomNavigationElementShadowStroke1;
	private Color bottomNavigationElementShadowStroke2;
	private TabbedPropertySheetWidgetFactory factory;
	/**
	 * One of the tabs in the tabbed property list.
	 */
	public class ListElement extends Canvas {
		private ITabItem tab;
		private int index;
		private boolean selected;
		private boolean hover;
		/**
		 * Constructor for ListElement.
		 * 
		 * @param parent
		 *            the parent Composite.
		 * @param tab