allows frozen columns to be editable on keydown #1126
      
        
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Issue: When you have frozen columns in the data grid and try to edit a cell by typing a character, the edit portal doesn't open for frozen columns (except sometimes the first one).
Expected Behavior: Frozen columns should always be editable by typing, regardless of scroll position.
Actual Behavior: Frozen columns beyond the first one weren't editable when typing characters.