Exposing the Icon Theme through the REST API

[vmassol]

@tmortagne

Yes I did not notice that back then, but it’s a mistake IMO. All the APIs which are dealing with URL parameters are handling this as a parameter which contains a list (or an array) value. The REST API itself gets a List<String> as parameter as you can see in xwiki-platform/TranslationsResource.java at master · xwiki/xwiki-platform · GitHub.

The question is not what you get in the implementation code, but what you specify in the API, as a user and using plural would not make sense to me and would be counter-intuitive which is never good for an API.