Added servers list and edit server

lib/widgets/process_dialog.dart

@@ -0,0 +1,33 @@
+import 'package:flutter/material.dart';
+
+class ProcessDialog extends StatelessWidget {
+  final String message;
+
+  const ProcessDialog({
+    Key? key,
+    required this.message,
+  }) : super(key: key);
+
+  @override
+  Widget build(BuildContext context) {
+    return WillPopScope(
+      onWillPop: () async => false,
+      child: Dialog(
+        backgroundColor: Theme.of(context).dialogBackgroundColor,
+        child: Padding(
+          padding: const EdgeInsets.symmetric(
+            vertical: 30,
+            horizontal: 30
+          ),
+          child: Row(
+            children: [
+              const CircularProgressIndicator(),
+              const SizedBox(width: 40),
+              Text(message)
+            ],
+          ),
+        ),
+      ),
+    );
+  }
+}