frontend statefulset/list: fix List view broken

[yuriscott]

I found there is a error that will crash the StateFulSet/List
`
label: t('Containers'),
getValue: statefulSet => statefulSet.containerNames.join(', '),
render: statefulSet => {

`
seem like statefulSet object has no property named 'containerNames'

So I change the code to
getValue: statefulSet => statefulSet.getContainers().map(it => it.name).join(', '),

[sniok]

good catch, thanks!

@joaquimrocha we should include this in the upcoming release

[joaquimrocha]

@yuriscott , the CI is failing on code styling. Can you run npm run format from the frontend plugin and squash the results to your commit?

[joaquimrocha]

Closing in favor of #2002 . It's the same author/changes, just formatted. Thank you so much @yuriscott !