Bug 129812 [Markers] Enabling problem categorization per default
Build 3.2M5 Recent progress on problem categorization should be made more proeminent by enabling categorization by default. Similar to search view doing hierarchical presentation by default nowadays.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/views/markers/internal/MarkerSupportRegistry.java
return singleton;
	}
	private Collection registeredFilters = new ArrayList();
	private Map markerGroups = new HashMap();
	private Map markerGroupingEntries = new HashMap();
	private HashMap categories = new HashMap();
	private HashMap hierarchyOrders = new HashMap();
	private MarkerType rootType;
	/**
	 * Create a new instance of the receiver and read the registry.
	 */
	private MarkerSupportRegistry() {
		IExtensionTracker tracker = PlatformUI.getWorkbench()
				.getExtensionTracker();
		IExtensionPoint point = Platform.getExtensionRegistry()
				.getExtensionPoint(IDEWorkbenchPlugin.IDE_WORKBENCH,
						MARKER_SUPPORT);
		if (point == null) {
			return;
		}
		IExtension[] extensions = point.getExtensions();
		
		for (int i = 0; i < extensions.length; i++) {
			IExtension extension = extensions[i];
			processExtension(tracker, extension);
		}
		tracker.registerHandler(this, ExtensionTracker
				.createExtensionPointFilter(point));
	}
	/**