move folder tree window a bit higher, to hide parent close button (#4456)

src/pfwbged/folder/link.py

@@ -101,6 +101,7 @@ class ContentTreeWidget(plone.formwidget.contenttree.widget.ContentTreeWidget):
                             var parent = $(this).parents("*[id$='-autocomplete']")
                             var window = parent.siblings("*[id$='-contenttree-window']")
                             window.showDialog('%(url)s', %(expandSpeed)d);
+                            window.css('top', window.position().top-50 + 'px');
                             $('#' + parent.attr('id').replace('autocomplete', 'contenttree')).contentTree(
                     {
                         script: '%(url)s',