Bug 21013 [PropertiesView] ComboBoxPropertyDescriptor should provide a defualt label provider
ComboBoxPropertyDescriptor requires an array of string values in its contructor. These are used to display in the combo box cell editor. Typically clients must also supply a label provider with the same array of values in order to show the correct value when the cell editor is not active. The descriptor should create a default label provider based on the values passed in its constructor.
bundles/org.eclipse.ui.views/src/org/eclipse/ui/views/properties/PropertyDescriptor.java
*/
	private Object id;
	/**
	 * The name to display for the property.
	 */
	private String display;
	
	/**
	 * Category name, or <code>null</code> if none (the default).
	 */
	private String category = null;
	/**
	 * Description of the property, or <code>null</code> if none (the default). 
	 */
	private String description = null;
	/**
	 * The help context ids, or <code>null</code> if none (the default). 
	 */
	private Object helpIds;
	/**
	 * The flags used to filter the property.
	 */
	private String[] filterFlags;
	/**
	 * The object that provides the property value's text and image, or 
	 * <code>null</code> if the default label provider is used (the default).
	 */
	private ILabelProvider labelProvider = null;
	/**
	 * The object to validate the values in the cell editor, or <code>null</code>