Fixes questions marked as incorrect, improves result view

gui/api/src/main/java/ch/gtache/fro/practice/gui/PracticeResultModel.java

@@ -1,8 +1,11 @@
 package ch.gtache.fro.practice.gui;
 
 import ch.gtache.fro.gui.Model;
+import ch.gtache.fro.practice.PracticeQuestion;
 import ch.gtache.fro.practice.PracticeResult;
 
+import java.util.List;
+
 /**
  * Model for the practice result view
  */
@@ -37,16 +40,16 @@ public interface PracticeResultModel extends Model {
     String failureLabel();
 
     /**
-     * The text for the label of successful guesses
+     * The list of successful questions
      *
-     * @return The text
+     * @return The list of questions
      */
-    String successListLabel();
+    List<PracticeQuestion> successList();
 
     /**
-     * The text for the label of failed guesses
+     * The list of failed questions
      *
-     * @return The text
+     * @return The list of questions
      */
-    String failureListLabel();
+    List<PracticeQuestion> failureList();
 }