quiz results sortable

app/views/admin/result/index.html.erb

@@ -5,11 +5,11 @@
 <main class="summary_tpl">
   <table cellspacing="0" cellpadding="0">
     <tr>
-      <th>Test ID</th>
-      <th>Experience</th>
-      <th>Client/Project</th>
+      <th><%= sortable "test_hash", "Test ID" %></th>
+      <th><%= sortable "experience" %></th>
+      <th><%= sortable "project", "Client/Project" %></th>
       <th>Recruiter</th>
-      <th>Submitted on</th>
+      <th><%= sortable  "completed_at", "Submitted on" %></th>
       <th>Interview?</th>
     </tr>