[Oracle] Don't report a cancelled card database update as successful (#7082)

* [Oracle] Don't report a cancelled card database update as successful (#3470)

Took 3 minutes

* [Oracle] Only report cancel when nothing was saved yet

Rejecting the wizard after SaveSetsPage or a download page already
wrote the database to disk still replaced cards.xml on disk, but
wasCancelled() forced exit code 1 so Cockatrice skipped the reload.
Track successful saves with OracleWizard::markDatabaseSaved() and only
treat a cancel as a failure when nothing was saved.

* [Oracle] Restore updater stderr in card update error dialog

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Co-authored-by: Lukas Brübach <Bruebach.Lukas@bdosecurity.de>

oracle/src/pagetemplates.cpp

@@ -178,6 +178,10 @@ void SimpleDownloadFilePage::actDownloadFinished()
 {
     // check for a reply
     auto *reply = dynamic_cast<QNetworkReply *>(sender());
+    if (wizard()->wasCancelled()) {
+        reply->deleteLater();
+        return;
+    }
     QNetworkReply::NetworkError errorCode = reply->error();
     if (errorCode != QNetworkReply::NoError) {
         QMessageBox::critical(this, tr("Error"), tr("Network error: %1.").arg(reply->errorString()));
@@ -242,6 +246,7 @@ bool SimpleDownloadFilePage::saveToFile()
 
     // clean saved downloadData
     downloadData = QByteArray();
+    wizard()->markDatabaseSaved();
     return true;
 }