PURPOSE
=======
During the Salary Package Configurator implementation, some improvement have been made to improve the fleet management module
- When duplicating a fleet vehicle cost (for example when duplication a vehicle contract), duplicate the included costs too.
- Add a field Cost Description on the list view
- Rename 'Acquisition Date' into 'Immatriculation Date'
- Rename 'Car Value' into 'Catalog Value (VAT incl.)'
- Add a information field 'Residual Value on a vehicle'
- Prevent an employee to have several cars
- Only display opened contract on the vehicle form view
- Add the driver on the odometer list view
- Rename 'Odometer value' into 'Odometer at creation' on a vehicle contract
- Restructure to vehicle model form view to be bearable by a human eye
- Show the handle widget on the fleet vehicle state list view
- Show configuration menuitems to fleet managers, not only debug mode
- Go in Fleet
- Group vehicle list by any variable (e.g. status)
- Open a vehicle from the list
- In vehicle page click on 'Contract'
It crashes.
The `group_by` context key is propagated to a list where the grouping
field doesn't exist.
Fixes#15154
Yannick Tivisse