New: Add the English version and the 3 digits of DFG Fachsystematik

coscine/issues#411

src/Project/Controllers/DisciplineController.cs

@@ -26,7 +26,7 @@ namespace Coscine.Api.Project.Controllers
         {
             return Ok(_authenticator.ValidateAndExecute((user) =>
             {
-                return _disciplineModel.GetAll().Select((discipline) => new DisciplineObject(discipline.Id, discipline.Url, discipline.DisplayName));
+                return _disciplineModel.GetAll().OrderBy(discipline => discipline.DisplayNameDe.Substring(discipline.DisplayNameDe.Length - 3)).Select((discipline) => new DisciplineObject(discipline.Id, discipline.Url, discipline.DisplayNameDe, discipline.DisplayNameEn));
             }));
         }
     }