Bug 127289 [Markers] SystemFilter and group selection state not preserved
We are not preserving the selection state of the system filters or which group is selected.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/views/markers/internal/MarkerView.java
}
	}
	private UpdateJob updateJob = new UpdateJob();
	
	
	private int preBusyMarkers = 0;
	protected Object[] focusElements;
	private Clipboard clipboard;
	IResourceChangeListener markerUpdateListener = new IResourceChangeListener() {
		/*
		 * (non-Javadoc)
		 * 
		 * @see org.eclipse.core.resources.IResourceChangeListener#resourceChanged(org.eclipse.core.resources.IResourceChangeEvent)
		 */
		public void resourceChanged(IResourceChangeEvent event) {
			String[] markerTypes = getMarkerTypes();
			Collection changedMarkers = new ArrayList();
			Collection addedMarkers = new ArrayList();
			Collection removedMarkers = new ArrayList();
			if (event.getType() == IResourceChangeEvent.PRE_BUILD) {
				markerProcessJob.buildDone = false;
				return;
			}
			if (event.getType() == IResourceChangeEvent.POST_BUILD) {
				markerProcessJob.buildDone = true;
				scheduleMarkerUpdate();
				return;
			}
			for (int idx = 0; idx < markerTypes.length; idx++) {
				IMarkerDelta[] markerDeltas = event.findMarkerDeltas(