+17-May-2009 Janusz Dobrowolski
++ Added excluding item/category from sales.
+$ /includes/ui/ui_lists.inc
+ /inventory/includes/db/items_category_db.inc
+ /inventory/includes/db/items_db.inc
+ /inventory/manage/item_categories.php
+ /inventory/manage/items.php
+ /sql/alter2.2.sql
+ /sql/alter2.2.php
+