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
* 
	 * @param subMonitor
	 * @return MarkerEntry
	 */
	private Collection computeAllMarkers(SubProgressMonitor subMonitor) {
		Collection allMarkers = new HashSet();
		findMarkers(allMarkers, new IResource[] { ResourcesPlugin
				.getWorkspace().getRoot() }, null, IResource.DEPTH_INFINITE,
				subMonitor);
		return allMarkers;
	}
	/**
	 * Compute the marker for the supplied filter and add to return markers.
	 * 
	 * @param returnMarkers
	 *            {@link Collection} of {@link IMarker}
	 * @param subMonitor
	 * @param filterGroup
	 */
	private void computeMarkers(Collection returnMarkers,
			SubProgressMonitor subMonitor, MarkerFieldFilterGroup filterGroup) {
		int filterType = filterGroup.getScope();
		switch (filterType) {
		case MarkerFieldFilterGroup.ON_ANY: {
			findMarkers(returnMarkers, new IResource[] { ResourcesPlugin
					.getWorkspace().getRoot() }, filterGroup,
					IResource.DEPTH_INFINITE, subMonitor);
			break;
		}
		case MarkerFieldFilterGroup.ON_SELECTED_ONLY: {