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
actionBars.setGlobalActionHandler(ActionFactory.SELECT_ALL.getId(),
				selectAllAction);
		actionBars.setGlobalActionHandler(ActionFactory.PROPERTIES.getId(),
				propertiesAction);
	}
	protected void initDragAndDrop() {
		int operations = DND.DROP_COPY;
		Transfer[] transferTypes = new Transfer[] {
				MarkerTransfer.getInstance(), TextTransfer.getInstance() };
		DragSourceListener listener = new DragSourceAdapter() {
			public void dragSetData(DragSourceEvent event) {
				performDragSetData(event);
			}
			public void dragFinished(DragSourceEvent event) {
			}
		};
		getViewer().addDragSupport(operations, transferTypes, listener);
	}
	/**
	 * The user is attempting to drag marker data. Add the appropriate data to
	 * the event depending on the transfer type.
	 */
	private void performDragSetData(DragSourceEvent event) {
		if (MarkerTransfer.getInstance().isSupportedType(event.dataType)) {
			event.data = getSelectedMarkers();
			return;
		}
		if (TextTransfer.getInstance().isSupportedType(event.dataType)) {
			List selection = ((IStructuredSelection) getViewer().getSelection())
					.toList();