Adjacent buttons in the arch are now displayed in a single column in list views (main and x2many views). As soon as there is a node in-between (even if it is invisible="1"), the rule doesn't apply anymore and buttons placed before/after that node are rendered in a separated column. Task 2261774 closes odoo/odoo#51970 Signed-off-by: Aaron Bohy (aab) <aab@odoo.com>