i18n: Clarify string for group access management

include/staff/group.inc.php

@@ -25,7 +25,7 @@ $info=Format::htmlchars(($errors && $_POST)?$_POST:$info);
  <input type="hidden" name="do" value="<?php echo $action; ?>">
  <input type="hidden" name="a" value="<?php echo Format::htmlchars($_REQUEST['a']); ?>">
  <input type="hidden" name="id" value="<?php echo $info['id']; ?>">
- <h2><?php echo __('User Group');?></h2>
+ <h2><?php echo __('Group Access and Permissions');?></h2>
  <table class="form_table" width="940" border="0" cellspacing="0" cellpadding="2">
     <thead>
         <tr>