fix: Pass optional expandDescendants arg to setColumnExpanded

[vbabich]

• Pass optional expandDescendants arg to setColumnExpanded
• Pass mouse handlers and renderer from IrisGridPanel to IrisGrid

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 44.95%. Comparing base (f7fe8ad) to head (017db92).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff            @@
##             main    #2540    +/-   ##
========================================
  Coverage   44.95%   44.95%            
========================================
  Files         765      765            
  Lines       42917    42920     +3     
  Branches    10796    10998   +202     
========================================
+ Hits        19293    19296     +3     
+ Misses      23611    23563    -48     
- Partials       13       61    +48     

Flag	Coverage Δ
unit	44.95% <100.00%> (+<0.01%)	⬆️

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[bmingles]

Looks good overall. Left comment about 1 place you could use your new MouseHandlersProp type

[bmingles]

LGTM