[SelectField] Does not call onChange after props.value is changed and user reselects original value

``` jsx
let option = [option1, option2];
<SelectField
        menuItems={options}
        value={this.props.value}
        onChange={e => this.onChange(e)}/>
```

When the initial `this.props.value` is `1` and is later changed to `2` and re-rendered the `onChange` event is not called when the user reselects `1`.
