Bug 32452: Link basket group on basket summary to basket groups page

Bug 32452: Link basket group on basket summary to basket groups page

In most places we already link the basket group name to the
basket group page, but not on the basket summary page.

To test:
* Create a basket/order with some order lines
* Close the basket and check the checkbox for creating a basket group
* Go back to the basket/order page
* There will be a link 'Manage basket group', but the basket group name
  is only text
* Apply patch
* Reload the page, the basket group name should now be linked

Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>