Fix regressions in the design of the project statistics bar.
What does this MR do?
Improves the design of the empty Changelog, Contribution guide, and License items in the project statistics bar.
Are there points in the code the reviewer needs to double check?
Don't think so, maybe that the project-stats class isn't used anywhere else (a grep suggests it's not)
Why was this MR needed?
Because the empty state of the repository didn't look as good anymore.
What are the relevant issue numbers?
Screenshots (if relevant)
Before:
After:
