When dragging an article with an open nest, the `jquery.mjs.nestedSortable` library does not refresh the positions of the following articles. This forces the user to drag the nest far below the target position to move the placeholder. This commit is a small fix to the library, to refresh said positions before checking for element intersection. Task-2883290 closes odoo/odoo#95749 Related: odoo/enterprise#29315 Signed-off-by: Thibault Delavallee (tde) <tde@openerp.com>