Fixed numerous bugs within talk and file upload

lib/view/pages/files/fileUploadDialog.dart

@@ -43,7 +43,6 @@ class _FileUploadDialogState extends State<FileUploadDialog> {
       setState(() {
         state = FileUploadState.checkConflict;
       });
-      //await (await WebdavApi.webdav).mkcol(widget.remotePath.join("/")); // TODO is this needed? It does not work anymore...
       List<WebDavResponse> result = (await webdavClient.propfind(widget.remotePath.join("/"))).responses;
       if(result.any((element) => element.href!.endsWith("/$targetFileName"))) {
         setState(() {