Thumbnails (and handling) of uploaded files on new entries that have not yet been saved

api/js/etemplate/et2_extension_customfields.js

@@ -627,6 +627,7 @@ var et2_customfields_list = (function(){ "use strict"; return et2_valueWidget.ex
 				// Filemanager select
 				{
 					label: '',
+					mode: widget.options.multiple ? 'open-multiple' : 'open',
 					method: 'EGroupware\\Api\\Etemplate\\Widget\\Link::link_existing',
 					method_id: attrs.path,
 					button_label: egw.lang('Link')