Add automated frontend tests for group management

[jacbn]

Adds tests to replace the need for manual E2E tests for group management.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 37.28%. Comparing base (cc04483) to head (7b893dc).

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1005      +/-   ##
==========================================
+ Coverage   35.72%   37.28%   +1.55%     
==========================================
  Files         420      420              
  Lines       18534    18538       +4     
  Branches     5424     6037     +613     
==========================================
+ Hits         6621     6911     +290     
+ Misses      11875    11588     -287     
- Partials       38       39       +1     

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[skyepurchase]

LGTM. One test is missing for teachers to reset the password of a student

[skyepurchase]

I had missed the already existing test for password reset. Will update the spreadsheet accordingly