Optimize name retrieving from backend

[davidyuk]

we can get the names from the names list in the store, the stored name for an account is also the preferredChainName, as the backend sorts them that way when they are globally fetched. This reduces the number of requests.

Originally posted by @thepiwo in #1133 (comment)

[davidyuk]

we have switched to make a separate request in b685f61, but I can't recall why cc: @AtanasKrondev

I'm planning to revert it in future PRs