Before this commit the dropdown items in the channel kanban view were not centered, this fix the issue by adapting the css rules. Task-3086160 closes odoo/odoo#108552 X-original-commit: 7d1a013b43ce9196e1f2f7a602cf8161d44776ad Signed-off-by: Stéphane Debauche (std) <std@odoo.com>