Only index the database when a valid uuid is present.

Refresh the database when a PS Vita is connected.

src/cmaclient.cpp

@@ -174,6 +174,7 @@ void CmaClient::enterEventLoop(vita_device_t *device)
 
     eventLoop.moveToThread(&thread);
     connect(&thread, SIGNAL(started()), &eventLoop, SLOT(process()));
+    connect(&eventLoop, SIGNAL(refreshDatabase()), this, SIGNAL(refreshDatabase()), Qt::DirectConnection);
     connect(&eventLoop, SIGNAL(finishedEventLoop()), &thread, SLOT(quit()), Qt::DirectConnection);
     thread.start();