Close report dialog if user has already sent a report

lib/ui/dialogs/report_dialog.dart

@@ -126,6 +126,7 @@ class _ReportDialogState extends SafeState<_ReportDialog> {
       } else if (result == ReportResult.ErrorAlreadyReported) {
         await alert(
             context, tr("You have already sent a report for this resource!"));
+        MainController.of(context)!.popPage();
       } else {
         await alert(context, tr("Failed to send report!"));
       }