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
* 
	 * @return TableSorter
	 */
	public TableSorter getTableSorter() {
		return (TableSorter) getViewer().getSorter();
	}
	/**
	 * Add a listener for the end of the update.
	 * 
	 * @param listener
	 */
	public void addUpdateFinishListener(IJobChangeListener listener) {
		updateJob.addJobChangeListener(listener);
	}
	/**
	 * Remove a listener for the end of the update.
	 * 
	 * @param listener
	 */
	public void removeUpdateFinishListener(IJobChangeListener listener) {
		updateJob.removeJobChangeListener(listener);
	}
	/**
	 * Create a listener for working set changes.
	 * 
	 * @return IPropertyChangeListener
	 */
	private IPropertyChangeListener getWorkingSetListener() {
		workingSetListener = new IPropertyChangeListener() {
			/*