This PR addresses a bug introduced in odoo/odoo/pull/109776 The user can indeed modify the timer, but because a started timer is a readonly field, the timer does not update. Using isDirty allows to check if the user really modified the timer. closes odoo/odoo#111064 X-original-commit: 9aa8752da18ed679d7ddae93682c045204083104 Signed-off-by: William Henrotin (whe) <whe@odoo.com>