Fixing a bug in spell preparation

src/main/lombok/org/leumasjaffe/charsheet/view/magic/PrepareSpellsDialog.java

@@ -96,6 +96,7 @@ public class PrepareSpellsDialog extends JPanel {
 
 	@Override
 	public void removeNotify() {
+		super.removeNotify();
 		ObserverDispatch.unsubscribeAll(allReady);
 	}
 }