UISelect: when using multiple & keys props list gets scrolled to top after select 

After selecting an item when using `multiple` and `keys` props togheter, scroll always gets back to the top.

Steps:
1. Open https://codesandbox.io/s/9422p2l53p
2. Open select and scroll to some bottom item.
3. Click to mark as selected.
4. Scroll returns to the top.