Bug 126233 [FieldAssist] DecoratedField should not automatically reserve space on field ends
bundles/org.eclipse.jface/src/org/eclipse/jface/fieldassist/DecoratedField.java
*/
	private FieldDecorationData[] decDatas = new FieldDecorationData[DECORATION_SLOTS];
	/**
	 * The associated control
	 */
	private Control control;
	/**
	 * The composite with form layout used to manage decorations.
	 */
	private Composite form;
	/**
	 * The hover used for showing description text
	 */
	private Hover hover;
	/**
	 * The hover used to show a decoration image's description.
	 */
	class Hover {
		private static final String EMPTY = ""; 
		/**
		 * Offset of info hover arrow from the left or right side.
		 */
		private int hao = 10;
		/**
		 * Width of info hover arrow.
		 */
		private int haw = 8;
		/**
		 * Height of info hover arrow.
		 */