refactors node visual rep
refactors node visual rep

adrianzhang/RabbitMQSimulator,RabbitMQSimulator/RabbitMQSimulator,RabbitMQSimulator/RabbitMQSimulator,Stackato-Apps/RabbitMQSimulator,adrianzhang/RabbitMQSimulator,Stackato-Apps/RabbitMQSimulator