Bug 202316 [Forms] Add gradient sharing support for FormHeading
bundles/org.eclipse.ui.forms/src/org/eclipse/ui/internal/forms/widgets/FormHeading.java
private String message;
		private int messageType;
		private CLabel messageLabel;
		private IMessage[] messages;
		private Hyperlink messageHyperlink;
		private ListenerList listeners;
		private Color fg;
		private int fontHeight = -1;
		private int fontBaselineHeight = -1;