[HUMAN App] Use name from chain when displaying oracle name

[dnechay]

Description
ATM on UI we display oracle name based on its url (url -> name mapping is hardcoded). It was implemented like this because oracles didn't have name property on chain. Right now oracles have this property so we can start to rely on it.

Motivation
To display actual name of the Oracle instead of some hardcoded values that depend on URL.

Implementation details
Extend server response with name property from chain and use it on UI. Cleanup old code