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
* @param type
	 * @return TableSorter
	 */
	public TableSorter getSorterFor(String type) {
		if (hierarchyOrders.containsKey(type)) {
			return (TableSorter) hierarchyOrders.get(type);
		}
		TableSorter sorter = findSorterInChildren(type, getRootType());
		if (sorter == null) {
			return new TableSorter(new IField[0], new int[0], new int[0]);
		}
		return sorter;
	}
	/**
	 * Return the list of root marker types.
	 * 
	 * @return List of MarkerType.
	 */
	private MarkerType getRootType() {
		if (rootType == null) {
			rootType = (MarkerTypesModel.getInstance())
					.getType(IMarker.PROBLEM);
		}
		return rootType;
	}
	/**
	 * Find the best match sorter for typeName in the children. If it cannot be
	 * found then return <code>null</code>.
	 * 
	 * @param typeName