Bug 10724: Pending orders: add basket group name in filters

Bug 10724: Pending orders: add basket group name in filters

This patch adds a new filter "basket group name" for pending orders
searches.

Test plan:
Try different filters and check that results are consistent.
Try to filter by basket group name.

Signed-off-by: Pierre Angot <tredok.pierre@gmail.com>
Signed-off-by: Katrin Fischer <Katrin.Fischer.83@web.de>
Applied on top of patches for bug 10723.
Passes all tests and QA script.

Note: It's a bit irritating that the basket name is not shown
in the list of pending orders, so there is no way to check the
results are correct without checking from another page.

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