Bug 29002: Add modal based booking cancellation

Bug 29002: Add modal based booking cancellation

This patch adds a modal based booking cancellation flow to the biblio
bookings display tab page.

Test plan
1) Follow the test plans for the previous patches
2) Note a new column now appears in the bookings table with a 'Cancel'
   action button against each booking
3) Cancel one of the bookings using the new cancel button
4) A modal dialog should appear allowing you to continue with the
   cancelation or cancel
5) Confirm the cancelled booking is removed from the bookings table
6) Sign off

Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Janet McGowan <janet.mcgowan@ptfs-europe.com>
Signed-off-by: Caroline Cyr La Rose <caroline.cyr-la-rose@inlibro.com>
Signed-off-by: Laurence Rault <laurence.rault@biblibre.com>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>