[FIX] note: css margins of next activity
[FIX] note: css margins of next activity

Fix CSS so it is more in line with other kanban tiles and avoid
unecessary margins.

opw-1817718
closes #24128

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