Display repository if required in quickstart maven snippet widget

[#52044647]
ProjectId should not be set in upstream repository

- editors of this repository can use the following command to avoid accidentally checking in _config.yml:
git update-index --assume-unchanged _config.yml
Merge changes from origin
Fix styles inside nested <p>
Add conditional processing for links at top of home page
Move sample page markup to sample-pages/
Merge branch 'gh-pages' of ../project-pages into gh-pages