[IMP] web: add spacing to list buttons
[IMP] web: add spacing to list buttons

A slight margin has been added between list view buttons to improve
clarity.

closes odoo/odoo#52254

Signed-off-by: Aaron Bohy (aab) <40b904fd8852297daeaeb426b1bca46fd2454aa3@odoo.com>

ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo