Fix not being able to set course passing grades above 80%.

cms/static/js/models/settings/course_grading_policy.js

@@ -76,7 +76,7 @@ var CourseGradingPolicy = Backbone.Model.extend({
                 }
             }
         }
-        if(_.has(attrs, 'minimum_grade_credit')) {
+        if(this.get('is_credit_course') && _.has(attrs, 'minimum_grade_credit')) {
             var minimum_grade_cutoff = _.values(attrs.grade_cutoffs).pop();
             if(isNaN(attrs.minimum_grade_credit) || attrs.minimum_grade_credit === null || attrs.minimum_grade_credit < minimum_grade_cutoff) {
                 return {

cms/templates/settings_graders.html

@@ -5,6 +5,7 @@
 
 <%namespace name='static' file='static_content.html'/>
 <%!
+  import json
   from contentstore import utils
   from django.utils.translation import ugettext as _
 %>
@@ -22,7 +23,7 @@
 </%block>
 <%block name="requirejs">
     require(["js/factories/settings_graders"], function(SettingsGradersFactory) {
-        SettingsGradersFactory(${course_details|n}, "${grading_url}");
+        SettingsGradersFactory(_.extend(${course_details|n}, {is_credit_course: ${json.dumps(is_credit_course)}}), "${grading_url}");
     });
 </%block>