Enable searching within a specific version of documentation only

Currently the search functionality provides a possibility to search within documentation of all products and all versions of the product. There is also no preference for the more recent versions when ranking the search hits. As a result it is difficult to find relevant pages within the documentation of the current version.

It would be very helpful to have a possibility to search within a selected version of the documentation. Also a global search should rank the documentation of the current release higher than the documentation of old versions and the beta version of the product.