Shwo a message when some lists are empty

virtweb_frontend/src/widgets/forms/VMDisksList.tsx

@@ -2,7 +2,7 @@ import { mdiHarddiskPlus } from "@mdi/js";
 import Icon from "@mdi/react";
 import CheckCircleIcon from "@mui/icons-material/CheckCircle";
 import DeleteIcon from "@mui/icons-material/Delete";
-import { Button, IconButton, Paper, Tooltip } from "@mui/material";
+import { Button, IconButton, Paper, Tooltip, Typography } from "@mui/material";
 import React from "react";
 import { DiskImage } from "../../api/DiskImageApi";
 import { ServerApi } from "../../api/ServerApi";
@@ -67,6 +67,12 @@ export function VMDisksList(p: {
         />
       ))}
 
+      {p.vm.file_disks.length === 0 && (
+        <Typography style={{ textAlign: "center", paddingTop: "25px" }}>
+          No disk file yet!
+        </Typography>
+      )}
+
       {p.editable && <Button onClick={addNewDisk}>Add new disk</Button>}
 
       {/* Disk backup */}