CardDatabase gains a new signal void cardDatabaseLoadingFinished(), which (#5156)

it will emit in loadCardDatabases(), mirroring the else branch where cardDatabaseLoadingFailed() is emitted.

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

cockatrice/src/game/cards/card_database.cpp

@@ -567,6 +567,7 @@ LoadStatus CardDatabase::loadCardDatabases()
     if (loadStatus == Ok) {
         checkUnknownSets(); // update deck editors, etc
         qDebug() << "CardDatabase::loadCardDatabases success";
+        emit cardDatabaseLoadingFinished();
     } else {
         qDebug() << "CardDatabase::loadCardDatabases failed";
         emit cardDatabaseLoadingFailed(); // bring up the settings dialog

cockatrice/src/game/cards/card_database.h

@@ -441,6 +441,7 @@ public slots:
 protected slots:
     LoadStatus loadCardDatabase(const QString &path);
 signals:
+    void cardDatabaseLoadingFinished();
     void cardDatabaseLoadingFailed();
     void cardDatabaseNewSetsFound(int numUnknownSets, QStringList unknownSetsNames);
     void cardDatabaseAllNewSetsEnabled();