TF-1899 Clear view state when no network

(cherry picked from commit e45c252f690aacc7baf9fda7c381ef43493a2de0)

lib/features/base/base_controller.dart

@@ -152,7 +152,6 @@ abstract class BaseController extends GetxController
 
   void handleExceptionAction(Exception exception) {
     log('BaseController::handleExceptionAction():exception: $exception');
-    clearState();
   }
 
   void handleFailureViewState(Failure failure) {

lib/features/thread/presentation/thread_controller.dart

@@ -189,6 +189,12 @@ class ThreadController extends BaseController with EmailActionController {
     _handleErrorGetAllOrRefreshChangesEmail(error, stackTrace);
   }
 
+  @override
+  void handleExceptionAction(Exception exception) {
+    super.handleExceptionAction(exception);
+    clearState();
+  }
+
   void _registerObxStreamListener() {
     ever(mailboxDashBoardController.selectedMailbox, (mailbox) {
       if (mailbox is PresentationMailbox) {