Bug 36428: (QA follow-up) Add bookings_count class to patron details

Bug 36428: (QA follow-up) Add bookings_count class to patron details

Somewhere along the line we lost the 'bookings_count' class in the
bookings tab display on the patron details and circulation page.

This patch restores is and as such also restores the correct count
numbers on 'place booking' and 'cancel booking' actions on those pages.

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