Documentation sidebar: present docs without navigating away
Problem
When I'm reading documentation in GitLab, I'd like to read without losing context on my current page. I typically have a question related to the page I'm currently on, and I need to open another tab or another browser window if I'd like to read side-by-side.
Proposal
Support opening documentation in a sidebar. Present documentation in a sidebar on the right hand side of the screen, with an option to expand the sidebar to the traditional full-screen docs view.
Maybe we can start with a very popular docs page like https://docs.gitlab.com/ee/ci/yaml/README.html and allow it to be presented in a sidebar. This would mean that I could reference this page a lot more easily when editing .gitlab-ci.yml in the editor or Web IDE.