Accessibility fixes (#1128)

lib/src/widgets/alert_close_button.dart

@@ -1,8 +1,10 @@
+import 'package:cake_wallet/generated/i18n.dart';
 import 'package:cake_wallet/palette.dart';
 import 'package:flutter/material.dart';
 
 class AlertCloseButton extends StatelessWidget {
   AlertCloseButton({this.image, this.bottom, this.onTap});
+
   final VoidCallback? onTap;
 
   final Image? image;
@@ -19,12 +21,17 @@ class AlertCloseButton extends StatelessWidget {
       bottom: bottom ?? 60,
       child: GestureDetector(
         onTap: onTap ?? () => Navigator.of(context).pop(),
-        child: Container(
-          height: 42,
-          width: 42,
-          decoration: BoxDecoration(color: Colors.white, shape: BoxShape.circle),
-          child: Center(
-            child: image ?? closeButton,
+        child: Semantics(
+          label: S.of(context).close,
+          button: true,
+          enabled: true,
+          child: Container(
+            height: 42,
+            width: 42,
+            decoration: BoxDecoration(color: Colors.white, shape: BoxShape.circle),
+            child: Center(
+              child: image ?? closeButton,
+            ),
           ),
         ),
       ),