fix: Assign custom form name on init

[iamareebjamal]

New field 'name' was added in custom form and it is
populated from backend, so new custom forms in
frontend were initialized without any name because
the previous logic of loading name as custom property
was removed. This is a temporary fix since custom forms
will start to be created on backend instead of frontend

Fixes #4506

[vercel]

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[codecov]

Codecov Report

Merging #4507 into development will decrease coverage by 0.00%.
The diff coverage is 0.00%.

@@               Coverage Diff               @@
##           development    #4507      +/-   ##
===============================================
- Coverage        22.26%   22.25%   -0.01%     
===============================================
  Files              470      470              
  Lines             4958     4960       +2     
  Branches             6        6              
===============================================
  Hits              1104     1104              
- Misses            3853     3855       +2     
  Partials             1        1              

Impacted Files	Coverage Δ
app/models/custom-form.js	0.00% <0.00%> (ø)

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