Bug 28179: Add a lightbox gallery to display cover images - detail page, staff interface

Bug 28179: Add a lightbox gallery to display cover images - detail page, staff interface

This patch adds the ability to display the cover images of a
bibliographic record in a gallery. Cover images attached to items can
also be displayed in separated galleries.

Test plan:
All the cover images are affected, all the different sources will be
tested.
All the steps will be done on the same bibliographic record.
1. Local cover images
 a. Turn on LocalCoverImages and AllowMultipleCovers
 b. Add several local cover images to a bibliographic record
 c. Add several local cover images to an item
 d. Click on an image and confirm that it is displayed in a gallery and
 you can navigate see all the images attached to the bibliographic
 record
 e. Same for items
2. Adlibris
 a. Turn on AdlibrisCoversEnabled
 b. Edit the biliographic record and add an ISBN that will return a
 cover image for this service (9780670026623 for instance)
 c. Display the cover images in the gallery
 d. Note the link to the adlibris.com website at the bottom
3. Amazon
 a. Turn on AmazonCoverImages
 b. Display the cover images in the gallery
4. Coce
 a. Turn on IntranetCoce, set CoceHost to "http://coce.tamil.fr:8080"
 and select some values for CoceProviders.
 b. Display the cover images in the gallery
5. Custom cover images
 a. Turn on CustomCoverImages and set CustomCoverImagesURL to https://covers.openlibrary.org/b/isbn/{isbn}-M.jpg
 of anything else meaningful
 b. Display the cover images in the gallery

Sponsored-by: Gerhard Sondermann Dialog e.K. (presseplus.de, presseshop.at, presseshop.ch)
Signed-off-by: Owen Leonard <oleonard@myacpl.org>
Signed-off-by: Rasmus Leißner <rasmus.leissner@solutions-factory.de>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>