Bug 208055 [Markers] Need a sorting method for the markers view
As there is currently no accessible way to change sort order or direction. A menu should be enough.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/provisional/views/markers/MarkerContentGenerator.java
if (mementoString.equals(IPreferenceStore.STRING_DEFAULT_DEFAULT))
			return;
		try {
			loadSettings(XMLMemento.createReadRoot(new StringReader(
					mementoString)));
		} catch (WorkbenchException e) {
			StatusManager.getManager().handle(e.getStatus());
		}
	}
	/**
	 * Load the settings from the memento.
	 * 
	 * @param memento
	 */
	private void loadSettings(IMemento memento) {
		if (memento == null)
			return;
		Boolean andValue = memento.getBoolean(TAG_AND);
		if (andValue != null)
			setAndFilters(andValue.booleanValue());
		IMemento children[] = memento.getChildren(TAG_GROUP_ENTRY);
		for (int i = 0; i < children.length; i++) {
			IMemento child = children[i];
			String id = child.getString(IMemento.TAG_ID);
			if (id == null)
				continue;
			if (!loadGroupWithID(child, id))
				
				loadUserFilter(child);
		}