fix angular's dirty handling for elements in an ng-grid (see https://github.com/angular-ui/ng-grid/issues/779)
fix angular's dirty handling for elements in an ng-grid (see https://github.com/angular-ui/ng-grid/issues/779)

FernCreek/ng-grid,ppossanzini/ui-grid,angular-ui/ng-grid-legacy,ppossanzini/ui-grid,FugleMonkey/ng-grid,FugleMonkey/ng-grid,FugleMonkey/ng-grid,FernCreek/ng-grid,angular-ui/ng-grid-legacy,ppossanzini/ui-grid,angular-ui/ng-grid-legacy,FernCreek/ng-grid