TF-1984 Handle empty Trash and Spam mailbox action

(cherry picked from commit de8f9c4c35dfe8ca423d3b2a9063d1c26de7cb7b)

lib/features/mailbox/presentation/mailbox_view_web.dart

@@ -302,6 +302,7 @@ class MailboxView extends BaseMailboxView {
                 controller
               );
             },
+            onEmptyMailboxActionCallback: (mailboxNode) => controller.emptyMailboxAction(context, mailboxNode.item),
           )),
           children: _buildListChildTileWidget(context, mailboxNode)
         ).build();
@@ -322,6 +323,7 @@ class MailboxView extends BaseMailboxView {
               controller
             );
           },
+          onEmptyMailboxActionCallback: (mailboxNode) => controller.emptyMailboxAction(context, mailboxNode.item),
         ));
       }
     }).toList() ?? <Widget>[];