Merge pull request #555 from edx/grady/ORA-729

Fixed ORA-740

openassessment/xblock/static/js/src/studio/oa_edit_assessment.js

@@ -281,6 +281,8 @@ OpenAssessment.EditStudentTrainingView = function(element) {
             containerItemClass: "openassessment_training_example"
         }
     );
+    
+    this.exampleContainer.addEventListeners();
 };
 
 OpenAssessment.EditStudentTrainingView.prototype = {