Profile tooltip: correct unit update

Fix #1821

Allow to get a correct unit in profile tooltip when a profile is modified. This was the lightest way as this tooltip does not call the updateLabel function in [ProfileService.js](mf-geoadmin3/src/components/profile/ProfileService.js).

[Testlink](http://mf-geoadmin3.dev.bgdi.ch/kan_profile_correct_unit_update/src/)