Bug 37047: Make Patron Bookings table visible from Patrons Checkout page

Bug 37047: Make Patron Bookings table visible from Patrons Checkout page

This patch makes it so that the patron bookings table loads properly from teh checkout page. Previously, it was only loading correctly from the details page.

To test:
1. Create an item bookable.
2. Book an item for a patron.
3. Go to the patron's checkout page.
4. See they have a Booking (1) in their tab.
5. Click this tab, but nothing appears.
6. Apply patch, restart_all
7. See they still have a Booking (1) in their tab.
8. Click this tab, table loads as expected.

Signed-off-by: Pedro Amorim <pedro.amorim@ptfs-europe.com>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>