Fix: a running client is not the same has rendering client

src/main/java/com/sheepit/client/standalone/swing/activity/Working.java

@@ -519,7 +519,7 @@ public class Working implements Activity {
 	}
 	
 	private int getJobsQueueSize(Client client) {
-		return client.getUploadQueueSize() + (client.isRunning() ? 1 : 0);
+		return client.getUploadQueueSize() + (client.getRenderingJob() != null ? 1 : 0);
 	}
 	
 	class PauseAction implements ActionListener {