Bug 38201: Add allowMultipleChoices prop to FormRelationshipSelect to consider multiple relationship choices

Signed-off-by: Michaela Sieber <michaela.sieber@kit.edu>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Lucas Gass <lucas@bywatersolutions.com>

koha-tmpl/intranet-tmpl/prog/js/vue/components/FormRelationshipSelect.vue

@@ -6,6 +6,7 @@
         "
         :reduce="relatedResource => relatedResource.sip_institution_id"
         :options="relatedResourcesOptions"
+        :multiple="allowMultipleChoices"
         :filter-by="filterRelatedResourcesOptions"
         v-model="resource[name]"
     >
@@ -22,6 +23,7 @@ export default {
         relationshipAPIClient: Object | null,
         resource: Object | null,
         name: String | null,
+        allowMultipleChoices: Boolean | null,
     },
     data() {
         return {