[xwiki-devs] [Proposal] Add NS support for Ratings space configuration

Hi devs, As I was working on the Forum Application, which depends on Ratings Application, I noticed that the rating configuration doesn't work as expected on the Nested Spaces versions of XWiki. For example, having A.WebPreferences with a XWiki.RatingsConfigClass object, the configuration does not apply to A.B.WebHome, because the configuration is set at space level, without inheritance to the below levels. As a solution for this I propose to create a new Api (getConfigurationDocument()) in the Ratings module which will check, starting the current document, and get the first ancestor that holds the XWiki.RatingsConfigClass object and use that as configuration document, keeping the fallback to the XWiki.RatingsConfig document. An issue has been created at http://jira.xwiki.org/browse/XWIKI-13274 and a first pull request at https://github.com/xwiki/xwiki-platform/pull/472, but without having been discussed here before. WDYT?