Replace WillPopScope to PopScope

(cherry picked from commit 0c610bd08916fc91273994e1a961247432b58e75)

lib/features/composer/presentation/view/mobile/mobile_container_view.dart

@@ -34,11 +34,9 @@ class MobileContainerView extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    return WillPopScope(
+    return PopScope(
-      onWillPop: () async {
+      onPopInvoked: (didPop) => !didPop ? onCloseViewAction : null,
-        onCloseViewAction.call();
+      canPop: false,
-        return false;
-      },
       child: GestureDetector(
         onTap: onClearFocusAction,
         child: Scaffold(

lib/features/composer/presentation/view/mobile/tablet_container_view.dart

@@ -31,11 +31,9 @@ class TabletContainerView extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    return WillPopScope(
+    return PopScope(
-      onWillPop: () async {
+      onPopInvoked: (didPop) => !didPop ? onCloseViewAction : null,
-        onCloseViewAction.call();
+      canPop: false,
-        return false;
-      },
       child: GestureDetector(
         onTap: onClearFocusAction,
         child: Scaffold(

lib/features/thread/presentation/thread_controller.dart

@@ -1199,6 +1199,18 @@ class ThreadController extends BaseController with EmailActionController {
     return DismissDirection.startToEnd;
   }
 
+  bool get inboxMailboxSelected => mailboxDashBoardController.selectedMailbox.value?.isInbox == true;
+
+  bool get systemBackGesturesEnable => inboxMailboxSelected && !mailboxDashBoardController.isDrawerOpen;
+
+  void backButtonPressedCallbackAction(BuildContext context) {
+    if (mailboxDashBoardController.isDrawerOpen) {
+      mailboxDashBoardController.closeMailboxMenuDrawer();
+    } else {
+      mailboxDashBoardController.openDefaultMailbox();
+    }
+  }
+
   void scrollToTop() {
     if (listEmailController.hasClients) {
       listEmailController.animateTo(0, duration: const Duration(milliseconds: 500), curve: Curves.fastOutSlowIn);