sortable: fixed missing placeholder default (fixes #3889)

diff --git a/ui/ui.sortable.js b/ui/ui.sortable.js
index 12915c562c245fd19a28c301020cc4dfef4ea533..aa97247933b76bf58de1146df1744d3d028cfb0d 100644 (file)
--- a/ui/ui.sortable.js
+++ b/ui/ui.sortable.js
@@ -995,6 +995,7 @@ $.extend($.ui.sortable, {
                handle: false,
                helper: "original",
                items: '> *',
+               placeholder: false,
                scope: "default",
                scroll: true,
                scrollSensitivity: 20,