fix icon add courses to session

main/admin/session_list.php

@@ -228,7 +228,7 @@ if (isset ($_GET['search']) && $_GET['search'] == 'advanced') {
 	      <td><?php echo api_htmlentities(api_get_person_name($enreg['firstname'], $enreg['lastname']),ENT_QUOTES,$charset); ?></td>
 		  <td>
 			<a href="add_users_to_session.php?page=session_list.php&id_session=<?php echo $enreg['id']; ?>"><?php Display::display_icon('add_user_big.gif', get_lang('SubscribeUsersToSession')); ?></a>
-			<a href="add_courses_to_session.php?page=session_list.php&id_session=<?php echo $enreg['id']; ?>"><?php Display::display_icon('synthese_view.gif', get_lang('SubscribeCoursesToSession')); ?></a>
+			<a href="add_courses_to_session.php?page=session_list.php&id_session=<?php echo $enreg['id']; ?>"><?php Display::display_icon('course_add.gif', get_lang('SubscribeCoursesToSession')); ?></a>
 			<a href="session_edit.php?page=session_list.php&id=<?php echo $enreg['id']; ?>"><?php Display::display_icon('edit.gif', get_lang('Edit')); ?></a>
 			<a href="<?php echo api_get_self(); ?>?sort=<?php echo $sort; ?>&action=delete&idChecked=<?php echo $enreg['id']; ?>" onclick="javascript:if(!confirm('<?php echo get_lang('ConfirmYourChoice'); ?>')) return false;"><?php Display::display_icon('delete.gif', get_lang('Delete')); ?></a>
 		  </td>