Extend global search result items rendering

[arina-tirreno]

Feature/problem:
The global search result appears as nearly plain texted dropdown list.

Possible solution:
formatResult: function(suggestion, currentValue) {...} defined in autocomplete config.
It should have a switch case depending on category, so, for example, user result will receive renderClickableImportantUserWithScore() rendering and IP result will receive renderIpWithCountry().
Also this approach requires some extra data from backend about search results (country id for IP, score for user, etc). Search models are located here and data aggregating is performed here.