Versions Dropdown v1.1 (next MVC)

• Move master to the top, above the divider => https://gitlab.com/gitlab-com/gitlab-docs/merge_requests/333
• Add tooltip next to master, explaining what it is => https://gitlab.com/gitlab-com/gitlab-docs/merge_requests/333
• Move the latest minor version down one spot, below the divider => https://gitlab.com/gitlab-com/gitlab-docs/merge_requests/333
• Rebuild online-archive versions with these changes => https://gitlab.com/gitlab-com/gitlab-docs/merge_requests/338