use the 'org.seedsecuritylabs.seedemu.meta.class' label of containers in web app

[amdfxlucas]

Services installed on nodes have the option to set a 'class' label on the container i.e. Node::appendClassName('WebService').

Up to now this label is never used in the web client.
In order to support overlay visualizations this information is useful.

[wonkr]

@amdfxlucas ,
Currently class label is used in the etherview application (https://github.com/seed-labs/seed-emulator/tree/master/tools/Blockchain/EtherView).
(I made a change it to merge into development branch instead of main branch.)
Your code seems to have upgrade the version of node js and multiple libraries of node js. We are currently being very cautious about version updates. We want to carefully review potential errors that may arise from version updates first. Due to limited manpower resources on our team, the schedule might take longer than expected. We are reviewing open issues one by one.
Thank you for your �contribution.

[wonkr]

I created a new branch client-overlay-support branch to test it. I will update the test result after the test is done. Thanks.