Add breadcrumbing and clarify some of the text on the

instructor grading interface.

lms/static/coffee/src/staff_grading/staff_grading.coffee

@@ -59,7 +59,7 @@ class StaffGradingBackend
     # sends in a course_id and a grader_id
     # should get back a list of problem_ids, problem_names, num_left, num_total
     else if cmd == 'get_problem_list'
-      @mock_cnt++
+      @mock_cnt = 1
       response = 
         success: true
         problem_list: [
@@ -122,6 +122,8 @@ class StaffGrading
     @submit_button = $('.submit-button')
     @ml_error_info_container = $('.ml-error-info-container')
 
+    @breadcrumbs = $('.breadcrumbs')
+    
     # model state
     @state = state_no_data
     @submission_id = null
@@ -246,8 +248,9 @@ class StaffGrading
     @state = state_no_data
 
   render_view: () ->
-    # clear the problem list
+    # clear the problem list and breadcrumbs
     @problem_list.html('')
+    @breadcrumbs.html('')
     @problem_list_container.toggle(@list_view)
     @message_container.html(@message)
     # only show the grading elements when we are not in list view or the state
@@ -283,6 +286,12 @@ class StaffGrading
     show_submit_button = true
 
     @error_container.html(@error_msg)
+    problem_list_link = $('<a>').attr('href', 'javascript:void(0);')
+      .append("Problem List")
+      .click => @get_problem_list()
+
+    # set up the breadcrumbing
+    @breadcrumbs.append(problem_list_link).append(" > #{@prompt_name}")
 
     if @state == state_error
       @set_button_text('Try loading again')

lms/templates/instructor/staff_grading.html

@@ -36,19 +36,19 @@
 
 <section class="prompt-wrapper">
 <h2 class="prompt-name"></h2>
-<h3>Question prompt</h3>
+<h3>Question</h3>
 <div class="prompt-container">
 </div>
 </section>
 
 <section class="submission-wrapper">
-<h3>Submission</h3>
+<h3>Student Submission</h3>
 <div class="submission-container">
 </div>
 </section>
 
 <section class="rubric-wrapper">
-<h3>Rubric</h3>
+<h3>Grading Rubric</h3>
 <div class="rubric-container">
 </div>