Bug 213448 [CommonNavigator] Linking open editors with content in Project Explorer not working on restart
On using the project explorer and clicking on the "link with navigator" icon - it links to the editor. However, when closing eclipse and reopening, the link does not automatically activate again, although the editor is open on a specific file. Clicking on the icon again, reactives the link.
bundles/org.eclipse.ui.navigator/src/org/eclipse/ui/internal/navigator/NavigatorPlugin.java
IEvaluationService.class);
		return es == null ? null : es.getCurrentState();
	}
	/**
	 * @return an evaluation context
	 */
	public static IEvaluationContext getEmptyEvalContext() {
		IEvaluationContext c = new EvaluationContext(getApplicationContext(),
				Collections.EMPTY_LIST);
		c.setAllowPluginActivation(true);
		return c;
	}
	/**
	 * @param selection 
	 * @return an evaluation context
	 */
	public static IEvaluationContext getEvalContext(Object selection) {
		IEvaluationContext c = new EvaluationContext(getApplicationContext(), selection);
		c.setAllowPluginActivation(true);
		return c;
	}
	
	
	/**
	 * Helper class to evaluate an expression.
	 */
	public static class Evaluator implements ISafeRunnable {
		EvaluationResult result;
		Expression expression;
		IEvaluationContext scope;