Use stack name if label not set

[knolleary]

Fixes #4032

Description

Ensures the label value passed to the <FormRow> options has a non-blank value - using the stack.nameifstack.label` hasn't been set.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 78.57%. Comparing base (f7a994a) to head (86fdc98).
Report is 26 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4033      +/-   ##
==========================================
- Coverage   78.58%   78.57%   -0.01%     
==========================================
  Files         284      284              
  Lines       12979    12982       +3     
  Branches     2890     2891       +1     
==========================================
+ Hits        10199    10201       +2     
- Misses       2780     2781       +1     

Flag	Coverage Δ
backend	78.57% <ø> (-0.01%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.