Focus opened by link module/class in sidebar

Hello!

Documentation for `Array` in Ruby [has links to other classes](https://devdocs.io/ruby~2.5/array), like `Parent` and `Included modules`.

When I go (click) on `Enumerable`, for example, I want to see it focused in the sidebar with the list of methods.

For now there remains `Array` and becomes inactive (gray).


And for list of `Enumerable` methods I have to scroll sidebar manually (or search it).

Thanks.