Mike items threshold page


![image](https://cloud.githubusercontent.com/assets/4157103/4481053/8c9dc760-499c-11e4-880e-0efe2edb4b33.png)


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@huboard:{"order":26.5,"milestone_order":87,"custom_state":""}
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Why not keep the checkboxes' state in it's own property of the state rather than "pollute" the state? You could use the same kind of dictionary in `this.state.checkboxes` or something. Only have a property (presumably set to `true`) for checked checkboxes.  This would even easily allow you to count how many are checked.