#235 Display operation scopes if defined in security scheme

[mb1511]

Slight UI change to display required scopes for OAuth 2.0 access tokens when defined in the operation security field (https://swagger.io/specification/#optional-oauth2-security) e.g.

  security: 
    - OAuth:
      - required/scope:read
      - required/scope:write

Example display:

Related to #235

Also added a link to the auth section, though ideally it would link to the exact auth flow.

[mrin9]

LGTM.
However styling needs to get approved from UX.
Instead of back n forth with the contributor, I suggest to merge as is to record the contribution and styling can be changed later (if needed) based on UX feedback

[mrin9]

Thank you for the PR !!!