Merge branch 'develop' of https://labs.maarch.org/maarch/MaarchCourrier into develop

apps/maarch_entreprise/Models/UsersModelAbstract.php

...maarch_entreprise/js/angular/app/Views/signatureBook.html

...rch_entreprise/js/angular/app/signature-book.component.js

...rch_entreprise/js/angular/app/signature-book.component.ts

apps/maarch_entreprise/js/angular/main.bundle.min.js

modules/visa/Controllers/VisaController.php

modules/visa/Models/VisaModel.php

modules/visa/Models/VisaModelAbstract.php