Bug 139986 [CommonNavigator] Convert catch(Error/Throwable) to SafeRunner
In several places the CN framework uses catch(Error/Throwable) to ensure that code does not bring the framework down. Change these to use SafeRunner.
bundles/org.eclipse.ui.navigator/src/org/eclipse/ui/internal/navigator/sorters/CommonSorterDescriptor.java
private IConfigurationElement element;
	private Expression parentExpression;
	private String id;
	protected CommonSorterDescriptor(IConfigurationElement anElement) { 
		element = anElement;
		init();
	}
	private void init() {
		id = element.getAttribute(ATT_ID);
		if (id == null) {