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 or <code>null</code>.
	 */
	private TableSorter findSorterInChildren(String typeName, MarkerType type) {
		MarkerType[] types = type.getAllSubTypes();
		TableSorter defaultSorter = null;
		if (hierarchyOrders.containsKey(type.getId())) {
			defaultSorter = (TableSorter) hierarchyOrders.get(type.getId());
		}
		for (int i = 0; i < types.length; i++) {
			MarkerType[] subtypes = types[i].getAllSubTypes();
			for (int j = 0; j < subtypes.length; j++) {
				TableSorter sorter = findSorterInChildren(typeName, subtypes[j]);
				if (sorter != null) {
					return sorter;
				}
			}
		}
		return defaultSorter;
	}
	/**
	 * Return the FieldMarkerGroups in the receiver.
	 * 
	 * @return Collection of FieldMarkerGroup
	 */
	public Collection getMarkerGroups() {
		return markerGroups.values();
	}
}