feat(config): change getrefreshrate to return value from localstorage
feat(config): change getrefreshrate to return value from localstorage

This is checking  the value from the localstorage and either return that value or the default value
from the config.

CLOSES DCOS-60344

dcos/dcos-ui,dcos/dcos-ui,dcos/dcos-ui,dcos/dcos-ui,dcos/dcos-ui