bug(dropdown) state is lost in dropdown item

[mousemke]

after adjusting the "set directly to state" issue #163, we now lose the state. as it turns out, the state had a reference to the parents object (passed as this.props.item) and keeping the reference to that may have been why the state was set in suck a non standard way.

DoD:
items should keep their selected state

[fragsalat]

Will be fixed with #177