Fix #82 where the default editor doesn't clear invalid cell styling.
Fix #82 where the default editor doesn't clear invalid cell styling.

EvNaverniouk/doby-grid,RobertoMalatesta/doby-grid,globexdesigns/doby-grid,globexdesigns/doby-grid,RobertoMalatesta/doby-grid,EvNaverniouk/doby-grid