Finetuning of the events' kanban cards by increasing the left column's width and resetting the font-size. task-3380825 part of task-3326263 closes odoo/odoo#128580 X-original-commit: cfc2cd2283b9687f10209e1dc7e3c84060b12fcf Signed-off-by: Thibault Delavallee (tde) <tde@openerp.com>