Bug 56818 [PropertiesView] Clicking on Advanced Properties toggle when categories are collapsed removes the + next to the category
Clicking on Advanced Properties toggle when categories are collapsed removes the plus sign (+) next to the category and it can no longer be expanded. To reproduce: 1.)Open the Properties view. 2.)Have Show Categories turned on, and Show Advanced Properties turned off. 3.)Collapse all open categories. 4.)Click the Show Advanced Properties button. 5.)Note the plus sign goes away and the categories can no longer be expanded. You need to click the Show Advanced Properties button off to see the plus sign again.
bundles/org.eclipse.ui.views/src/org/eclipse/ui/views/properties/PropertySheetViewer.java
* <code>PropertySheetCategory</code>.
 *  
 */
class PropertySheetViewer extends Viewer {
	
	private Object[] input;
	
	private IPropertySheetEntry rootEntry;
	
	private PropertySheetCategory[] categories;
	
	private TableTree tableTree;
	private TableTreeEditor tableTreeEditor;
	private static String[] columnLabels = {
			PropertiesMessages.getString("PropertyViewer.property"), PropertiesMessages.getString("PropertyViewer.value")}; 
	private static String MISCELLANEOUS_CATEGORY_NAME = PropertiesMessages
			.getString("PropertyViewer.misc"); 
	
	private int columnToEdit = 1;
	private CellEditor cellEditor;
	private IPropertySheetEntryListener entryListener;
	private ICellEditorListener editorListener;
	
	private boolean isShowingCategories = true;
	
	private boolean isShowingExpertProperties = false;
	
	private IStatusLineManager statusLineManager;
	
	private ListenerList activationListeners = new ListenerList(3);