Bug 212408 [Markers] Markers updating during inconsistent state
We are updating during builds. As a result we get a lot of half constructed markers. We should 1) Cache default state 2) delay updates while a build is going on
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/provisional/views/markers/CachedMarkerBuilder.java
private MarkerGroup categoryGroup;
	private Collection enabledFilters;
	private Collection filters;
	private IResource[] focusResources = MarkerSupportInternalUtilities.EMPTY_RESOURCE_ARRAY;
	private MarkerField[] visibleFields;
	private boolean andFilters = false;
	private MarkerComparator comparator;
	private IMemento memento;
	private String viewId;
	
	/**
	 * Create a new instance of the receiver. Update using the updateJob.
	 * 
	 * @param contentGenerator
	 * @param id
	 *            id of the view we are building for
	 */
	CachedMarkerBuilder(MarkerContentGenerator contentGenerator, String id,
			IMemento memento) {
		this.generator = contentGenerator;
		this.viewId = id;
		initialiseVisibleFields();
		this.memento = memento;
		if (memento != null) {
			
			String categoryGroupID = memento.getString(TAG_CATEGORY_GROUP);
			if (categoryGroupID == null)
				setDefaultCategoryGroup(contentGenerator);
			else {
				if (categoryGroupID.equals(VALUE_NONE))