Docs UX improvements and minor content changes
Created by: ryan-blunden
- Content links now respect docs branch (instead of always navigating to master)
- Re-ordered nav so 'Install Sourcegraph' and 'Configure Sourcegraph' are at the top of the admin nav section
- Changed index links on the admin/config/index page
- Increased width of left nav and decreased width of page nav
- Left nav now scrolls to selected nav item on page load
- Breadcrumb trail respects terms that are in all caps
- Fixed error in startSourcegraphCommandInit if the docker run command snippet does not exist on the page
- Fixed mobile bug where the content nav could not be expanded