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/MarkerView.java
StringReader reader = new StringReader(preference);
		try {
			restoreFilters(XMLMemento.createReadRoot(reader));
		} catch (WorkbenchException e) {
			IDEWorkbenchPlugin.log(e.getLocalizedMessage(), e);
		}
	}
	/**
	 * Update for filter changes. Save the preference and clear the enabled
	 * cache.
	 */
	void updateForFilterChanges() {
		XMLMemento memento = XMLMemento.createWriteRoot(TAG_FILTERS_SECTION);
		writeFiltersSettings(memento);
		StringWriter writer = new StringWriter();
		try {
			memento.save(writer);
		} catch (IOException e) {
			IDEWorkbenchPlugin.getDefault().getLog().log(Util.errorStatus(e));
		}
		IDEWorkbenchPlugin.getDefault().getPreferenceStore().putValue(
				getFiltersPreferenceName(), writer.toString());
		IDEWorkbenchPlugin.getDefault().savePluginPreferences();
		clearEnabledFilters();
	}
	/**
	 * Write the filter settings to the memento.
	 * 
	 * @param memento
	 */