Fix HTML return

lms/templates/peer_grading/peer_grading.html

@@ -1,4 +1,4 @@
-<section class="container">
+<section class="container peer-grading-container">
     <div class="peer-grading" data-ajax_url="${ajax_url}">
         <div class="error-container">${error_text}</div>
         <h1>Peer Grading</h1>
@@ -22,7 +22,7 @@
                 %for problem in problem_list:
                 <tr data-graded="${problem['num_graded']}" data-required="${problem['num_required']}">
                     <td class="problem-name">
-                        <a href="${ajax_url}problem?location=${problem['location']}">${problem['problem_name']}</a>
+                        <a href="#problem" data-location="${problem['location']}" class="problem-button">${problem['problem_name']}</a>
                     </td>
                     <td>
                         ${problem['num_graded']}

lms/templates/peer_grading/peer_grading_problem.html

@@ -1,4 +1,4 @@
-<section class="container">
+<section class="container peer-grading-container">
     <div class="peer-grading" data-ajax_url="${ajax_url}" data-location="${problem_location}">
         <div class="error-container"></div>