Bug 213040 [Markers] Selected filters not being kept on restart
When I select "Warnings on Selection" and then restart it is not selected when I come back in. We need to retain these selections. Note this is only a problem when selecting from the menu - from the dialog works fine.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/provisional/views/markers/MarkerContentGenerator.java
private Collection filters;
	private IResource[] focusResources = MarkerSupportInternalUtilities.EMPTY_RESOURCE_ARRAY;
	private Collection markerTypes;
	private MarkerField[] visibleFields;
	private boolean andFilters = false;
	private MarkerComparator comparator;
	private IMemento memento;
	/**
	 * Create a new MarkerContentGenerator
	 * 
	 * @param element
	 */
	public MarkerContentGenerator(IConfigurationElement element) {
		configurationElement = element;
	}
	/**
	 * Add the groups defined in the receiver to the collection of groups.
	 * 
	 * @param groups
	 */
	private void addDefinedGroups(Collection groups) {
		IConfigurationElement[] children = configurationElement
				.getChildren(MarkerSupportRegistry.MARKER_SUPPORT_REFERENCE);
		for (int i = 0; i < children.length; i++) {
			
			if (!children[i]
					.getAttribute(MarkerSupportConstants.ATTRIBUTE_TYPE)
					.equals(MarkerSupportRegistry.MARKER_GROUPING))
				continue;
			MarkerGroup group = MarkerSupportRegistry