Fixed name display to apply filters.

vpl.class.php

@@ -1603,9 +1603,8 @@ class mod_vpl {
      * Show vpl name
      */
     public function print_name() {
-        echo '<h2>';
-        p( $this->get_printable_name() );
-        echo '</h2>';
+        global $OUTPUT;
+        echo $OUTPUT->heading(format_string($this->get_printable_name()));
     }
 
     public function str_restriction($str, $value = null, $raw = false) {