Fix hotkeys in peer and staff grading to use ctrl prefix

common/lib/xmodule/xmodule/js/src/peergrading/peer_grading_problem.coffee

@@ -161,6 +161,7 @@ class @PeerGradingProblem
   constructor: (backend) ->
     @prompt_wrapper = $('.prompt-wrapper')
     @backend = backend
+    @is_ctrl = false
 
 
     # get the location of the problem
@@ -212,6 +213,7 @@ class @PeerGradingProblem
     @answer_unknown_checkbox = $('.answer-unknown-checkbox')
 
     $(window).keydown @keydown_handler
+    $(window).keyup @keyup_handler
 
     @collapse_question()
 
@@ -338,13 +340,17 @@ class @PeerGradingProblem
       @grade = Rubric.get_total_score()
 
   keydown_handler: (event) =>
-    if event.which == 13 && @submit_button.is(':visible')
+    if event.which == 17 && @is_ctrl==false
+      @is_ctrl=true
+    else if event.which == 13 && @submit_button.is(':visible') && @is_ctrl==true
       if @calibration
         @submit_calibration_essay()
       else
         @submit_grade()
 
-
+  keyup_handler: (event) =>
+    if event.which == 17 && @is_ctrl==true
+      @is_ctrl=false
 
 
   ##########

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

@@ -185,6 +185,7 @@ class @StaffGrading
 
 
     $(window).keydown @keydown_handler
+    $(window).keyup @keyup_handler
     @question_header = $('.question-header')
     @question_header.click @collapse_question
     @collapse_question()
@@ -206,6 +207,7 @@ class @StaffGrading
     @num_pending = 0
     @score_lst = []
     @grade = null
+    @is_ctrl = false
 
     @problems = null
 
@@ -231,10 +233,16 @@ class @StaffGrading
       @state = state_graded
       @submit_button.show()
 
-  keydown_handler: (e) =>
-    if e.which == 13 && !@list_view && Rubric.check_complete()
+  keydown_handler: (event) =>
+    if event.which == 17 && @is_ctrl==false
+      @is_ctrl=true
+    else if @is_ctrl==true && event.which == 13 && !@list_view && Rubric.check_complete()
       @submit_and_get_next()
 
+  keyup_handler: (event) =>
+    if event.which == 17 && @is_ctrl==true
+      @is_ctrl=false
+
   set_button_text: (text) =>
     @action_button.attr('value', text)