Shop filter in "Product manufacturer" and "Product Suppliers" tab"

To be consistent in the whole program and improve product management it would be awesome to add the Shop filter to the "Product manufacturer" and "Product Suppliers" tabs. I have manufacturers and suppliers per shop in multishop installations and in the Manager I just see them all togeter, would be nice to see them per shop.

Thanks.

P.S. The shop filter would be like the attachment but just the shop filter, no date selector or anything else.