Store actual answers while playing a quiz
Implement monitoring of quizzes.

@silvenon
Use #time_ago_in_words for time
Fix an error in the migration
Color wrong/right/no answers and quitting
Don't use list for answer sequence
Modify markup of individual played quiz answer types
Style column widths of played quizzes table
Add icon to monitoring quiz option
fixup! 8735117
Fix leave confirmation interference
Try to fix confirm leave
Remove a console.log
Separate and refactor JavaScript
Visually mute interrupted
Organize question classes

Organize into:

- Design
- Play
- Feedback
- Played
Add a module for subtle look
Separate played question list
Simplify correct/wrong feedback
Simplify displaying played quizzes