fixes #2306 move save buttons to bottom of page (PR #2346)

For these pages :
 picture modify, album notification, category permission, comments, menubar, all configurations, site update, element set ranks, notification by mail

Change how success and errors messages are displayed and handled

admin/menubar.php

@@ -136,7 +136,12 @@ UPDATE '.CONFIG_TABLE.'
   ';
   pwg_query($query);
 
-  $page['infos'][] = l10n('Order of menubar items has been updated successfully.');
+  $template->assign(
+    array(
+      'save_success' => l10n('Order of menubar items has been updated successfully.'),
+    )
+  );
+
 }
 
 make_consecutive( $mb_conf );