Disabled out of date fix for files, and disabled file download in staging

lib/api/marianumcloud/webdav/queries/listFiles/listFiles.dart

@@ -1,7 +1,6 @@
 
 import 'package:nextcloud/nextcloud.dart';
 
-import '../../../../../model/endpointData.dart';
 import '../../webdavApi.dart';
 import 'cacheableFile.dart';
 import 'listFilesParams.dart';
@@ -18,12 +17,13 @@ class ListFiles extends WebdavApi<ListFilesParams> {
     Set<CacheableFile> files = davFiles.map((e) => CacheableFile.fromDavFile(e)).toSet();
 
     // webdav handles subdirectories wrong, this is a fix
-    if(EndpointData().getEndpointMode() == EndpointMode.stage) {
-      files = files.map((e) { // somehow
-        e.path = e.path.split("mobile/cloud/remote.php/webdav")[1];
-        return e;
-      }).toSet();
-    }
+    // currently this fix is not needed anymore
+    // if(EndpointData().getEndpointMode() == EndpointMode.stage) {
+    //   files = files.map((e) { // somehow
+    //     e.path = e.path.split("mobile/cloud/remote.php/webdav")[1];
+    //     return e;
+    //   }).toSet();
+    // }
 
     // somehow the current working folder is also listed, it is filtered here.
     files.removeWhere((element) => element.path == "/${params.path}/" || element.path == "/");

lib/view/pages/files/fileElement.dart

@@ -6,11 +6,13 @@ import 'package:flowder/flowder.dart';
 import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
 import 'package:jiffy/jiffy.dart';
+import 'package:marianum_mobile/widget/infoDialog.dart';
 import 'package:nextcloud/nextcloud.dart';
 import 'package:path_provider/path_provider.dart';
 
 import '../../../api/marianumcloud/webdav/queries/listFiles/cacheableFile.dart';
 import '../../../api/marianumcloud/webdav/webdavApi.dart';
+import '../../../model/endpointData.dart';
 import '../../../widget/centeredLeading.dart';
 import '../../../widget/confirmDialog.dart';
 import '../../../widget/fileViewer.dart';
@@ -103,6 +105,10 @@ class _FileElementState extends State<FileElement> {
             },
           ));
         } else {
+          if(EndpointData().getEndpointMode() == EndpointMode.stage) {
+            InfoDialog.show(context, "Virtuelle Dateien im Staging Prozess können nicht heruntergeladen werden!");
+            return;
+          }
           if(widget.file.currentlyDownloading) {
             showDialog(
               context: context,