Bug 153888 [Markers] Marker views update on each resource delta (was: Problems view flashes when launching anything)
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/views/markers/internal/MarkerView.java
* This method is called whenever a selection changes in this view.
	 * </p>
	 * 
	 * @param selection
	 *            a valid selection or <code>null</code>
	 */
	protected void updateStatusMessage(IStructuredSelection selection) {
		String message = ""; 
		if (selection == null || selection.size() == 0) {
			
			message = updateSummaryVisible();
		} else if (selection.size() == 1) {
			
			Object first = selection.getFirstElement();
			if (first instanceof ConcreteMarker) {
				message = ((ConcreteMarker) first).getDescription();
			}
		} else if (selection.size() > 1) {
			
			message = updateSummarySelected(selection);
		}
		getViewSite().getActionBars().getStatusLineManager()
				.setMessage(message);
	}
	/**
	 * @param selection
	 * @return the summary status message
	 */
	protected String updateSummarySelected(IStructuredSelection selection) {