Standardize button actions in confirm dialog

lib/features/base/base_mailbox_controller.dart

@@ -456,7 +456,6 @@ abstract class BaseMailboxController extends BaseController {
         title: AppLocalizations.of(context).deleteFolders,
         cancelTitle: AppLocalizations.of(context).cancel,
         onConfirmAction: () => onDeleteMailboxAction(presentationMailbox),
-        onCancelAction: popBack,
         onCloseButtonAction: popBack,
       );
     }

lib/features/base/extensions/handle_mailbox_action_type_extension.dart

@@ -85,7 +85,6 @@ extension HandleMailboxActionTypeExtension on BaseMailboxController {
           currentRights,
           MailboxActions.allowSubaddressing,
         ),
-        onCancelAction: popBack,
         onCloseButtonAction: popBack,
       );
     }

lib/features/base/mixin/mailbox_action_handler_mixin.dart

@@ -94,7 +94,6 @@ mixin MailboxActionHandlerMixin {
             );
           }
         },
-        onCancelAction: popBack,
       );
     }
   }
@@ -147,7 +146,6 @@ mixin MailboxActionHandlerMixin {
             );
           }
         },
-        onCancelAction: popBack
       );
     }
   }