Fix #2290: Add "Visible within challenge team" option to profile page (#2312)
Fix #2290: Add "Visible within challenge team" option to profile page (#2312)

Test plan:

- Enroll in the challenge
- Navigate to http://localhost:9000/en/profile/info
- Click the "Leaderboard Visibility" dropdown

"Visible within challenge team" option should appear.

- Select "Visible within challenge team"
- Click "Save"
- Navigate to http://localhost:9000/en/dashboard/challenge?date=2019-11-24
- Click the eyeball in one of the leaderboards

"Visible" / "Visible for team only" should be selected.
gozer/voice-web,gozer/voice-web,common-voice/common-voice,gozer/voice-web,gozer/voice-web,common-voice/common-voice,gozer/voice-web,gozer/voice-web,common-voice/common-voice,common-voice/common-voice,gozer/voice-web