Bug 127629 [Markers] problems view: keep selection stable
I20050214-0010 1. Select a grouping (e.g. Java problem type) and select a marker inside 2. Switch to another grouping Selection is gone. Same when - changing filter - a build adds new marker (in a different file)
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/views/markers/internal/MarkerView.java
* 
	 */
	public final void openFiltersDialog() {
		DialogMarkerFilter dialog = createFiltersDialog();
		if (dialog.open() == Window.OK) {
			MarkerFilter[] result = dialog.getFilters();
			if (result == null) {
				return;
			}
			if (result.length == 0) {
				setFilters(new MarkerFilter[] { createFilter(MarkerMessages.MarkerFilter_defaultFilterName) });
			} else {
				setFilters(result);
			}
			updateForFilterChanges();
			refreshFilterMenu();
			refreshViewer();
		}
	}
	/**
	 * Refresh the contents of the viewer.
	 */
	public void refreshViewer() {
		scheduleMarkerUpdate(Util.SHORT_DELAY);
	}
	/**
	 * Set the filters to newFilters.
	 * 
	 * @param newFilters
	 */