Bug 117071 MembersOrderPreferenceCache leaking a propertyChangeListener
20051109 org.eclipse.jdt.ui.PreferenceConstants#initializeDefaultValues adds a listener to JDT UI preference store but this is not deleted before shutdown.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/ui/PreferenceConstants.java
* A named preference that controls whether keywords are rendered in italic.
	 * <p>
	 * Value is of type <code>Boolean</code>.
	 * </p>
	 * 
	 * @since 3.0
	 */
	public final static String EDITOR_JAVA_KEYWORD_ITALIC= IJavaColorConstants.JAVA_KEYWORD + EDITOR_ITALIC_SUFFIX;
	
	/**
	 * A named preference that controls whether keywords are rendered in strikethrough.
	 * <p>
	 * Value is of type <code>Boolean</code>.
	 * </p>
	 * 
	 * @since 3.1
	 */
	public final static String EDITOR_JAVA_KEYWORD_STRIKETHROUGH= IJavaColorConstants.JAVA_KEYWORD + EDITOR_STRIKETHROUGH_SUFFIX;
	
	/**
	 * A named preference that controls whether keywords are rendered in underline.
	 * <p>
	 * Value is of type <code>Boolean</code>.
	 * </p>
	 * 
	 * @since 3.1
	 */
	public final static String EDITOR_JAVA_KEYWORD_UNDERLINE= IJavaColorConstants.JAVA_KEYWORD + EDITOR_UNDERLINE_SUFFIX;
	/**
	 * A named preference that holds the color used to render string constants.