fix #5770: verify that the keyCode is greater than zero (#6380)
fix #5770: verify that the keyCode is greater than zero (#6380)

* Update gridEdit.js

Verify that the keyCode is greater than zero.
#5770

* remove tabs

* code style

* code style

InteractiveIntelligence/ng-grid,InteractiveIntelligence/ng-grid,AgDude/ng-grid,Servoy/ng-grid,ntmuigrid/ntmuigrid,angular-ui/ui-grid,angular-ui/ng-grid,angular-ui/ui-grid,angular-ui/ng-grid,AgDude/ng-grid,AgDude/ng-grid,Servoy/ng-grid,InteractiveIntelligence/ng-grid,Servoy/ng-grid,angular-ui/ui-grid,angular-ui/ng-grid,ntmuigrid/ntmuigrid,ntmuigrid/ntmuigrid