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
*/
	protected void fillContextMenu(IMenuManager manager) {
		if (manager == null) {
			return;
		}
		manager.add(openAction);
		createShowInMenu(manager);
		manager.add(new Separator());
		manager.add(copyAction);
		pasteAction.updateEnablement();
		manager.add(pasteAction);
		if (canBeEditable()) {
			manager.add(deleteAction);
		}
		manager.add(selectAllAction);
		fillContextMenuAdditions(manager);
		manager.add(new Separator(IWorkbenchActionConstants.MB_ADDITIONS));
		manager.add(new Separator());
		manager.add(propertiesAction);
	}
	/**
	 * Return whether or not any of the types in the receiver can be editable.
	 * 
	 * @return <code>true</code> if it is possible to have an editable marker
	 *         in this view.
	 */
	boolean canBeEditable() {
		return true;
	}
	/**