Bug 9779 - Remove global include of YUI assets from the staff client

Bug 9779 - Remove global include of YUI assets from the staff client

There are no pages in the staff client which use YUI JS assets other
than basketgroups.tt. The links to YUI assets can therefore be removed
from the global include and put directly into the basket groups
template.

Signed-off-by: Srdjan <srdjan@catalyst.net.nz>
Signed-off-by: Katrin Fischer <Katrin.Fischer.83@web.de>
Passes all tests and QA script. Really nice to see YUI go.
Checked that the drag&drop functionality in basket groups still works.

Signed-off-by: Galen Charlton <gmc@esilibrary.com>