feat: Add max value warning and disable the submit button

[farhaanbukhsh]

Based on: #402

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 94.99%. Comparing base (e458d6f) to head (b063153).

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #426      +/-   ##
==========================================
+ Coverage   94.98%   94.99%   +0.01%     
==========================================
  Files         139      139              
  Lines        1356     1359       +3     
  Branches      265      265              
==========================================
+ Hits         1288     1291       +3     
  Misses         60       60              
  Partials        8        8              

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[farhaanbukhsh]

@bradenmacdonald @arbrandes Can you folks review this PR, please 😇

[bradenmacdonald]

@farhaanbukhsh Can you please provide test instructions, or get another reviewer to confirm that this is working? I don't even know how to access the gradebook, but am happy to help review if you provide the instructions (or a sandbox).