Fix #149 TextCell should trigger error and high light the text box if the formatter returns undefined
Fix #149 TextCell should trigger error and high light the text box if the formatter returns undefined

aboieriu/backgrid,crealytics/backgrid,getjaco/backgrid,bryce-gibson/backgrid,digideskio/backgrid,aboieriu/backgrid,kirill-zhirnov/backgrid,goodwall/backgrid,bryce-gibson/backgrid,goodwall/backgrid,digideskio/backgrid,wyuenho/backgrid,jesseditson/backgrid,blackducksoftware/backgrid,getjaco/backgrid,qferr/backgrid,kirill-zhirnov/backgrid,qferr/backgrid,ludoo0d0a/backgrid,jesseditson/backgrid,ludoo0d0a/backgrid,wyuenho/backgrid,blackducksoftware/backgrid