QtIFW

ignore filtered repositories as early as possible

 - we had a recursion if a repository was added which
   was filtered later again

Change-Id: I980a613fa75de42940ec49b941e302f1bf326ca9
Reviewed-by: Iikka Eklund <iikka.eklund@digia.com>
Reviewed-by: Karsten Heimrich <karsten.heimrich@digia.com>