update item on article change instead of deleting and recreating it
update item on article change instead of deleting and recreating it

svn path=/trunk/KDE/kdepim/akregator/; revision=433783

lefou/kdepim-noakonadi,lefou/kdepim-noakonadi,lefou/kdepim-noakonadi,lefou/kdepim-noakonadi,lefou/kdepim-noakonadi,lefou/kdepim-noakonadi