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
IConfigurationElement[] mappings = next.getElement().getChildren(
					ATTRIBUTE_MAPPING);
			for (int i = 0; i < mappings.length; i++) {
				String entryId = mappings[i]
						.getAttribute(MARKER_GROUPING_ENTRY);
				if (markerGroupingEntries.containsKey(entryId)) {
					MarkerGroupingEntry entry = (MarkerGroupingEntry) markerGroupingEntries
							.get(entryId);
					entry.mapAttribute(next.getMarkerType(), next
							.getAttribute(), mappings[i].getAttribute(VALUE));
				} else {
					IDEWorkbenchPlugin.log(NLS.bind(
							"Reference to invaild markerGroupingEntry {0}", 
							defaultEntryId));
				}
			}
		}
	}
	/**
	 * Get the markerTypes defined in element.
	 * 
	 * @param element
	 * @return String[]
	 */
	private String[] getMarkerTypes(IConfigurationElement element) {
		IConfigurationElement[] types = element
				.getChildren(MARKER_TYPE_REFERENCE);
		String[] ids = new String[types.length];
		for (int i = 0; i < ids.length; i++) {
			ids[i] = types[i].getAttribute(ID);