French translation: "searchForm.savePopup.error" is displayed instead of its value

Description:

"searchForm.savePopup.error" is displayed instead of "Vous ne pouvez pas utiliser le caractère '/' dans le nom".  

Github: https://github.com/nuxeo/nuxeo-web-ui/blob/6549accb432c7712e7cad7c9488cb20197273fd0/i18n/messages-fr.json#L1283

Repro:

1. Use French as a language for the Nuxeo UI
2.  Save a search with "ENREGISTRER SOUS"
3. Type "/" under "Enregistrer la recherche"

Result:

"searchForm.savePopup.error" is displayed (cf. screenshot attached)

Expected result:

"Vous ne pouvez pas utiliser le caractère '/' dans le nom"  should be displayed

Observations:

FWIW, the error message also appears in the following scenario in which "/" is not even typed in the input bar:

1. Save a search with "ENREGISTRER SOUS"
2. Once the search is saved, click again on "ENREGISTRER SOUS"