Fix validation issue/error in challenge editor

[AndrewPhilbin]

Fixes a problem where failing form validation on submit for any reason in the long form view would then prevent any progress if subsequently switching to the short form view by triggering the same submit error.

[codecov-commenter]

Codecov Report

Attention: 2 lines in your changes are missing coverage. Please review.

Comparison is base (ac6c97f) 23.58% compared to head (285fee1) 23.58%.
Report is 2 commits behind head on main.

Files	Patch %	Lines
...ge/ManageChallenges/EditChallenge/EditChallenge.js	0.00%	1 Missing and 1 partial ⚠️

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Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2275      +/-   ##
==========================================
- Coverage   23.58%   23.58%   -0.01%     
==========================================
  Files         648      648              
  Lines       22497    22498       +1     
  Branches     6954     6955       +1     
==========================================
  Hits         5306     5306              
  Misses      14373    14373              
- Partials     2818     2819       +1     

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