Timeouts inside Picklist cause issues with setState

[aurbano]

Having calls to setState(...) inside of timeouts in the Pickselect component would trigger the typical error:

Can only update a mounted or mounting component. This usually means you called setState() on an unmounted component. This is a no-op. Please check the code for the undefined component.

I've submitted PR #127 to fix this issue

[ButuzGOL]

Agreed also in DropDown @stomita please explain