Court report submission status

[steve-meyers]

What github issue is this PR for, if any?

Resolves #882

What changed, and why?

On the CASA Case Details view there is a line that reads:
Court Report Submission: Not Submitted IF Course Report Submitted is NOT checked on the CASA Case edit page
or
Court Report Submission: Submitted IF Course Report Submitted is checked on the CASA Case edit page

How will this affect user permissions?

• Volunteer permissions: N/A
• Supervisor permissions: N/A
• Admin permissions: N/A

How is this tested? (please write tests!) 💖💪

• I added a decorator test (note: the previously added CasaCaseDecorator methods don't have tests yet)
• I updated volunteer_edits_a_case_spec.rb and supervisor_edits_a_case_spec.rb (note: there seems to be a hold on the admin_edits_a_case_spec.rb due to a TravisCI issue so I didn't add to that test)

Screenshots please :)

Other Notes

• I wasn't able to get the JS test suite to run
• I ran the 3 linter commands in the README and it changed a lot! I am guessing it hadn't been run in a while so hopefully, that doesn't cause any issues. The RSpec test passes after the linter changes but I can't double-check that the JS tests still pass.
• I would be happy to revert the linter changes if they cause problems

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[compwron]

It looks good and I love the tests!
In general, avoid putting a big linter changeset in the same PR as non-lint work because it makes the PR difficult to review, especially if there's not a separate build for the changes-without-lint.
I made a copy of your branch without linting at https://github.com/rubyforgood/casa/pull/913/files to see the build pass. When that passes, I'll merge this PR, since some lint is nice to have- in retrospect I should have run it before hacktober but we were still recovering from power week 😅

[compwron]

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