Fix signal not always emitted from messagreply

ext/libstrawberry-common/core/messagereply.h

@@ -20,6 +20,7 @@
 
 #include <QtGlobal>
 #include <QObject>
+#include <QThread>
 #include <QSemaphore>
 #include <QString>
 
@@ -88,6 +89,9 @@ void MessageReply<MessageType>::SetReply(const MessageType &message) {
   qLog(Debug) << "Releasing ID" << id() << "(finished)";
   semaphore_.release();
 
+  // The signal is not always emitted without this.
+  QThread::usleep(10);
+
   emit Finished(success_);
 
 }