Fix #346 correct redirect after saving attendance.

regression caused by mobile app restructuring.

renderer.php

@@ -415,7 +415,8 @@ class mod_attendance_renderer extends plugin_renderer_base {
             $table .= $this->render_attendance_take_grid($takedata);
         }
         $table .= html_writer::input_hidden_params($takedata->url(array('sesskey' => sesskey(),
-                                                                        'page' => $takedata->pageparams->page)));
+                                                                        'page' => $takedata->pageparams->page,
+                                                                        'perpage' => $takedata->pageparams->perpage)));
         $table .= html_writer::end_div();
         $params = array(
                 'type'  => 'submit',

take.php

@@ -77,6 +77,9 @@ if (($formdata = data_submitted()) && confirm_sesskey()) {
     if (!empty($att->pageparams->page) && $att->pageparams->page && $totalusers && $usersperpage) {
         $numberofpages = ceil($totalusers / $usersperpage);
         if ($att->pageparams->page < $numberofpages) {
+            $params = array(
+                'sessionid' => $att->pageparams->sessionid,
+                'grouptype' => $att->pageparams->grouptype);
             $params['page'] = $att->pageparams->page + 1;
             redirect($att->url_take($params), get_string('moreattendance', 'attendance'));
         }