Bug 22445: Custom cover images - opac shelves

Test plan:
Add a bibliographic record (that has a custom image) to a shelf,
view the shelf (OPAC).
You should see the image.

Sponsored-by: Orex Digital
Signed-off-by: Hayley Mapley <hayleymapley@catalyst.net.nz>
Signed-off-by: Hugo Agud <hagud@orex.es>
Signed-off-by: Owen Leonard <oleonard@myacpl.org>
Signed-off-by: Michal Denar <black23@gmail.com>
Signed-off-by: Kyle Hall <kyle@bywatersolutions.com>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>

koha-tmpl/opac-tmpl/bootstrap/en/modules/opac-shelves.tt

@@ -360,6 +360,11 @@
                                                                 <span class="no-image">No cover image available</span>
                                                             [% END %]
                                                         [% END %]
+
+                                                        [% IF Koha.Preference('OPACCustomCoverImages') AND Koha.Preference('CustomCoverImagesURL') %]
+                                                            <img alt="Cover image" src="[% itemsloo.biblio_object.custom_cover_image_url | url %]" /></a>
+                                                        [% END %]
+
                                                     </div>
                                                     [% IF ( itemsloo.XSLTBloc ) %]
                                                         [% itemsloo.XSLTBloc | $raw %]

opac/opac-shelves.pl

@@ -327,7 +327,8 @@ if ( $op eq 'view' ) {
                     $this_item->{incart} = 1;
                 }
 
-                $this_item->{biblionumber} = $biblionumber;
+                $this_item->{biblio_object} = $biblio;
+                $this_item->{biblionumber}  = $biblionumber;
                 push @items, $this_item;
             }