Resolve "Improve project overview UI"

What does this MR do?

1. Makes everything left aligned
2. Adds the label to the visibility level icon
3. Uses standard buttons and controls
4. Adds permanent links to Files, Commits, Branches and Tags
5. Enforces quick links ordering
6. Makes project description collapsible
7. Moves license to the top header row
8. Makes clone widget a split button on mobile
9. Makes quick links section scrollable on smaller screens

Are there points in the code the reviewer needs to double check?

N/A

Why was this MR needed?

See https://gitlab.com/gitlab-org/gitlab-ce/issues/44704

Screenshots (as of 2018-08-21)

Mobile	Tablet	Desktop

Does this MR meet the acceptance criteria?

• Changelog entry added, if necessary
• Documentation created/updated
• API support added
• Tests added for this feature/bug
• Conform by the code review guidelines
  • Has been reviewed by a UX Designer
  • Has been reviewed by a Frontend maintainer
  • Has been reviewed by a Backend maintainer
• Conform by the merge request performance guides
• Conform by the style guides
• Conform by the database guides
• If you have multiple commits, please combine them into a few logically organized commits by squashing them
• Internationalization required/considered
• End-to-end tests pass (package-and-qa manual pipeline job)

What are the relevant issue numbers?

Closes #44704 (closed)