Added option for file deletion

lib/widget/confirmDialog.dart

@@ -0,0 +1,29 @@
+import 'package:flutter/material.dart';
+
+class ConfirmDialog extends StatelessWidget {
+  final String title;
+  final String content;
+  final IconData? icon;
+  final String confirmButton;
+  final String cancelButton;
+  final void Function() onConfirm;
+  const ConfirmDialog({Key? key, required this.title, this.content = "", this.icon, this.confirmButton = "Ok", this.cancelButton = "Abbrechen", required this.onConfirm}) : super(key: key);
+
+  @override
+  Widget build(BuildContext context) {
+    return AlertDialog(
+      icon: icon != null ? Icon(icon) : null,
+      title: Text(title),
+      content: Text(content),
+      actions: [
+        TextButton(onPressed: () {
+          Navigator.of(context).pop();
+        }, child: Text(cancelButton)),
+        TextButton(onPressed: () {
+          onConfirm();
+          Navigator.of(context).pop();
+        }, child: Text(confirmButton)),
+      ],
+    );
+  }
+}