Issue 204 fix quiz submission bug

[ErikaKK]

Change Summary

[Briefly summarise the changes that you made. Just high-level stuff]
Fixed some bugs:

• after a comp is submitted the user should be redirected to /quiz not /quiz/[id]
  • does the restart un-submit the quiz attempt? No
  • does the restart create another quiz attempt when you click start? No
  • how does the restart affect the quiz-attempts page in dashboard/results/[id]/quiz-attempts/? Won't affect anything bc it's not a restart, the server will not allow a second attempt for the same comp
• student view sidebar didn't show
• quiz app view.py didn't filter competition properly.
• the mobile view navbar shows login instead of dashboard.
• visitors can access competition.
• when a comp has already finished, you can still start the quiz
• Once a student submitted a comp, can still start the comp (will get 400 from server)
• couldn't get matching user id from student model

Change Form

Fill this up (NA if not available). If a certain criteria is not met, can you please give a reason.

• The pull request title has an issue number
• The change works by "Smoke testing" or quick testing
• The change has tests
• The change has documentation

Other Information

[Is there anything in particular in the review that I should be aware of?]
Still needs to be done:

• quiz model status field is very hard to understand. Considering replace it with filtering date is_comp and visible field
• didn't have attempts in the sidebar for students. It seems we haven't implemented this feature
• when the question is the last one in a practice quiz, this next button should change to submit
• answer is auto filled for same question in comp. Will it only store one attempt for each question?
• TODOs in comp components

Related issue

• Resolve Fix quiz submission bug #204

[AarifLamat]

good work!

[AarifLamat]

can you remove the comment here since it's no longer relevant pls