autocomplete online (#15313)

* autocomplete online

* review fix

* review fix

* remove literalInput

flutter/test/server_settings_dialog_test.dart

@@ -0,0 +1,38 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:flutter_hbb/mobile/widgets/dialog.dart';
+
+void main() {
+  testWidgets('server settings text fields preserve literal input',
+      (tester) async {
+    final controller = TextEditingController(text: 'AbCdR1c1E=');
+    addTearDown(controller.dispose);
+
+    await tester.pumpWidget(MaterialApp(
+      home: Scaffold(
+        body: serverSettingsTextFormField(
+          label: 'Key',
+          controller: controller,
+          errorMsg: '',
+          autofocus: true,
+        ),
+      ),
+    ));
+
+    final textField = tester.widget<TextField>(find.byType(TextField));
+
+    expect(textField.controller, controller);
+    expect(textField.autofocus, isTrue);
+    expect(textField.keyboardType, TextInputType.visiblePassword);
+    expect(textField.textCapitalization, TextCapitalization.none);
+    expect(textField.autocorrect, isFalse);
+    expect(textField.enableSuggestions, isFalse);
+    expect(textField.smartDashesType, SmartDashesType.disabled);
+    expect(textField.smartQuotesType, SmartQuotesType.disabled);
+    expect(textField.enableIMEPersonalizedLearning, isFalse);
+    expect(
+      textField.spellCheckConfiguration,
+      const SpellCheckConfiguration.disabled(),
+    );
+  });
+}