Fix workorder times problems:
- sum in workorders list view
(displays numeric value rather than mins:secs)
- timers sometimes starts at -00:01
- almost all tablet view actions reset the timer (click burger, ...)
- clicking pause stops the timer at the next second
- seconds are lost in employee timers
Task: 2985735
X-original-commit: 7dceef12771890f9fb9fa554e70414c622053ced
Part-of: odoo/odoo#106908
JF Aubert
b7e499473c