renamed files back to localized string

lib/state/app/modules/app_modules.dart

@@ -62,7 +62,7 @@ class AppModule {
       ),
       Modules.files: AppModule(
         Modules.files,
-        name: 'Files',
+        name: 'Dateien',
         icon: () => Icon(Icons.folder),
         breakerArea: BreakerArea.files,
         create: Files.new,