Add confirmation prompt when deleting a user from a course team

cms/templates/manage_users.html

@@ -162,6 +162,14 @@
 
 <%block name="jsextra">
 <script type="text/javascript">
+  window.section = new CMS.Models.Section({
+    id: "${context_course.id}",
+    name: "${context_course.display_name_with_default | h}",
+    url_name: "${context_course.location.name | h}",
+    org: "${context_course.location.org | h}",
+    num: "${context_course.location.course | h}",
+    revision: "${context_course.location.revision | h}"
+  });
   var staffEmails = ${json.dumps([user.email for user in staff])};
   var tplUserURL = "${reverse('course_team_user', kwargs=dict(
       org=context_course.location.org,
@@ -270,7 +278,16 @@
     });
 
     $('.remove-user').click(function() {
-      var url = tplUserURL.replace("@@EMAIL@@", $(this).data('id'))
+      var email = $(this).data('id');
+      var msg = new CMS.Views.Prompt.Warning({
+        title: gettext("Are you sure?"),
+        message: _.template(gettext("Are you sure you want to delete {email} from the course team for {course}?"), {email: email, course: section.get('name')}, {interpolate: /\{(.+?)\}/g}),
+        actions: {
+          primary: {
+            text: gettext("Delete"),
+            click: function(view) {
+              view.hide();
+              var url = tplUserURL.replace("@@EMAIL@@", email)
               $.ajax({
                 url: url,
                 type: 'DELETE',
@@ -302,6 +319,17 @@
                   prompt.show();
                 }
               });
+            }
+          },
+          secondary: {
+            text: gettext("Cancel"),
+            click: function(view) {
+              view.hide();
+            }
+          }
+        }
+      });
+      msg.show();
     });
 
     $(".toggle-admin-role").click(function(e) {