Change exercise icon to show if exercise's deadline has passed

Author: Redande

tmc-plugin/src/fi/helsinki/cs/tmc/ui/ExerciseIconAnnotator.java

@@ -68,6 +68,9 @@ public Image annotateIcon(Project nbProject, Image origImg, boolean openedNode)
         //Had some very weird problems with that. Try again some day.
 
         Image img = origImg;
+        if (exercise.hasDeadlinePassed()) {
+            img = ImageUtilities.createDisabledImage(origImg);
+        }
         try {
             Image annotation = annotationIconForExericse(exercise);
             if (annotation != null) {
@@ -98,7 +101,7 @@ private Image annotationIconForExericse(Exercise exercise) throws IOException {
 
     private String annotationIconNameForExercise(Exercise exercise) {
         if (exercise.hasDeadlinePassed()) {
-            return null;
+            return "expired-project-dot.png";
         } else if (exercise.isAttempted() && exercise.isCompleted() && exercise.isAllReviewPointsGiven()) {
             return "green-project-dot.png";
         } else if (exercise.isAttempted() && exercise.isCompleted()) {