Task/empty cell validation morecast

[conbrad]

Adds back changes from #3957

Adds bug fix in bcaef5b that allows ModelChoice.NULL for default precip values

Closes #3954

Test Links:

Landing Page
MoreCast
Percentile Calculator
C-Haines
FireBat
FireBat bookmark
Auto Spatial Advisory (ASA)
HFI Calculator

[codecov]

Codecov Report

Attention: Patch coverage is 94.23077% with 3 lines in your changes missing coverage. Please review.

Project coverage is 80.01%. Comparing base (2873115) to head (bcaef5b).

Files with missing lines	Patch %	Lines
...c/features/moreCast2/components/TabbedDataGrid.tsx	40.00%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3982      +/-   ##
==========================================
+ Coverage   79.94%   80.01%   +0.06%     
==========================================
  Files         298      302       +4     
  Lines       11431    11466      +35     
  Branches      541      549       +8     
==========================================
+ Hits         9139     9175      +36     
  Misses       2106     2106              
+ Partials      186      185       -1     

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

[sonarcloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
1.1% Duplication on New Code

See analysis details on SonarCloud