Bug 37141: (follow-up) Check for expired bookings when rendering bookings table

Bug 37141: (follow-up) Check for expired bookings when rendering bookings table

We preserve the existing logic of this bug and add another case
for when we just encounter expired bookings.

In that case we render the fieldset without the 'filtered' class and
determine the value of filter_expired in bookings.js by the class being set.

Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>