Based on https://doc.ez.no/display/PR/%28n13%29+-+universal+discovery+widget#id-%28n13%29-universaldiscoverywidget-n13.4:Relationlistfield
EZP-24061 As an editor, I want to be able to select several contents in the universal discovery widget
EZP-23817 As a developer, I want to have a universal discovery widget to pick a content