TF-1288 Fix email detailed view automatically closes when focusing on composer's editor on the web

lib/features/email/presentation/controller/single_email_controller.dart

@@ -1130,4 +1130,10 @@ class SingleEmailController extends BaseController with AppLoaderMixin {
       emailSupervisorController.backToPreviousEmail();
     }
   }
+  Future<bool> backButtonPressedCallbackAction(BuildContext context) async {
+    if (!BuildUtils.isWeb) {
+      closeEmailView(context);
+    }
+    return false;
+  }
 }

lib/features/email/presentation/email_view.dart

@@ -43,10 +43,7 @@ class EmailView extends GetWidget<SingleEmailController>
   @override
   Widget build(BuildContext context) {
     return WillPopScope(
-      onWillPop: () async {
+      onWillPop: () => controller.backButtonPressedCallbackAction.call(context),
-        controller.closeEmailView(context);
-        return false;
-      },
       child: Scaffold(
         backgroundColor: responsiveUtils.isWebDesktop(context)
             ? AppColor.colorBgDesktop