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
* @return TableSorter
	 */
	public TableSorter getTableSorter() {
		return (TableSorter) getViewer().getSorter();
	}
	/**
	 * Add a listener for the end of the update.
	 * 
	 * @param listener
	 */
	public void addUpdateFinishListener(IJobChangeListener listener) {
		updateJob.addJobChangeListener(listener);
	}
	/**
	 * Remove a listener for the end of the update.
	 * 
	 * @param listener
	 */
	public void removeUpdateFinishListener(IJobChangeListener listener) {
		updateJob.removeJobChangeListener(listener);
	}
	/**
	 * Create a listener for working set changes.
	 * 
	 * @return IPropertyChangeListener
	 */
	private IPropertyChangeListener getWorkingSetListener() {
		workingSetListener = new IPropertyChangeListener() {
			/*
			 * (non-Javadoc)