Fix proxy-state-with-subtopic requests

[darkodraskovic]

When fetching states with attributes with subtopics we get this error in console:

[HPM] Error occurred while trying to proxy request /states/407785ab-5e49-4059-8704-24856c514759?offset=0&limit=10 from localhost:4200 to http://localhost:9201 (ECONNREFUSED) (https://nodejs
.org/api/errors.html#errors_common_system_errors)