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 multi-line comments are rendered in strikethrough.
	 * <p>
	 * Value is of type <code>Boolean</code>. If <code>true</code> multi-line comments are rendered
	 * in strikethrough. If <code>false</code> the are rendered using no strikethrough font style attribute.
	 * </p>
	 * 
	 * @since 3.1
	 */
	public final static String EDITOR_MULTI_LINE_COMMENT_STRIKETHROUGH= IJavaColorConstants.JAVA_MULTI_LINE_COMMENT + EDITOR_STRIKETHROUGH_SUFFIX;
	
	/**
	 * A named preference that controls whether multi-line comments are rendered in underline.
	 * <p>
	 * Value is of type <code>Boolean</code>. If <code>true</code> multi-line comments are rendered
	 * in underline. If <code>false</code> the are rendered using no underline font style attribute.
	 * </p>
	 * 
	 * @since 3.1
	 */
	public final static String EDITOR_MULTI_LINE_COMMENT_UNDERLINE= IJavaColorConstants.JAVA_MULTI_LINE_COMMENT + EDITOR_UNDERLINE_SUFFIX; 
	/**
	 * A named preference that holds the color used to render single line comments.
	 * <p>
	 * Value is of type <code>String</code>. A RGB color value encoded as a string
	 * using class <code>PreferenceConverter</code>
	 * </p>
	 * 
	 * @see org.eclipse.jface.resource.StringConverter
	 * @see org.eclipse.jface.preference.PreferenceConverter
	 */