Add a check result entry to nested forms

[DAGpro]

Q	A
Is bugfix?	❌
New feature?	✔️
Breaks BC?	❌

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 93.90%. Comparing base (fe63447) to head (e571106).
Report is 60 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master     #748      +/-   ##
============================================
- Coverage     94.40%   93.90%   -0.50%     
- Complexity      953     1019      +66     
============================================
  Files           108      120      +12     
  Lines          3018     3215     +197     
============================================
+ Hits           2849     3019     +170     
- Misses          169      196      +27     

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[arogachev]

The tests are needed. What's the purpose of these changes exactly?

[samdark]

@DAGpro so it calls nested object's hooks, right?

[DAGpro]

@samdark right

[vjik]

1. Add test with check error path in nested object.
2. Add line to changelog

[vjik]

@DAGpro thanks!