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 int one of MarkerView#ON_ANY MarkerView#ON_SELECTED_ONLY
	 *         MarkerView#ON_SELECTED_AND_CHILDREN
	 *         MarkerView#ON_ANY_IN_SAME_CONTAINER
	 */
	private int getSeverityValue(IConfigurationElement element) {
		String severity = element.getAttribute(SEVERITY);
		if (severity == null) {
			return -1;
		}
		if (severity.equals(INFO)) {
			return ProblemFilter.SEVERITY_INFO;
		}
		if (severity.equals(WARNING)) {
			return ProblemFilter.SEVERITY_WARNING;
		}
		if (severity.equals(ERROR)) {
			return ProblemFilter.SEVERITY_ERROR;
		}
		return -1;
	}
	/**
	 * Read the problem filters in the receiver.
	 * 
	 * @param element
	 *            the filter element
	 * @return ProblemFilter
	 */
	private ProblemFilter newFilter(IConfigurationElement element) {
		ProblemFilter filter = new ProblemFilter(element.getAttribute(NAME));
		filter.createContributionFrom(element);