Flatten arrays IViewField

[Sodininkas]

Category

[ ] Enhancement

[X ] Bug

[ ] Question

Version

Please specify what version of the library you are using: [ 1.10.0 ]

Expected / Desired Behavior / Question

Flatten arrays. this._flattenItems(this.props.items) in ListView.js. With this function I can't pass array to IViewField. It flatten array ant adds - .0, .1 as a strings. I think it would be better to leave ability turn this off, because now i need to do workarounds.