Adding pervasive column sorting

app/templates/admin/_users_table.html

@@ -1,8 +1,8 @@
 <div id="user-list" class="card">
-  <table class="table">
+  <table class="table sortable">
     <thead>
       <tr>
-        <th>ID</th><th>Email</th><th>Name</th><th>Active</th><th>Superuser</th><th>Roles</th><th></th>
+        <th>ID</th><th>Email</th><th>Name</th><th>Active</th><th>Superuser</th><th data-sort-off>Roles</th><th></th>
       </tr>
     </thead>
     <tbody>