Fix --pw-stdin by initializing text streams (#4912)

Co-authored-by: Sven qoreQyaS Grewe <sven.grewe@akquinet.de>

src/main.cpp

@@ -145,6 +145,7 @@ int main(int argc, char** argv)
             // buffer for native messaging, even if the specified file does not exist
             QTextStream out(stdout, QIODevice::WriteOnly);
             out << QObject::tr("Database password: ") << flush;
+            Utils::setDefaultTextStreams();
             password = Utils::getPassword();
         }