Loading more items with paginated loading via touch closes menu

[techniq]

When using touch input on the paginated loading story example, clicking "Load more items" closes the menu but still loads more items.

It's been difficult to get using a Portal with touch input correct...

For clicks, we initially would use onMouseUp={e => e.stopPropagation() on the react-popper instance to work around the issue, but this didn't work for touch.

I found using downshiftProps.getMenuProps(...) worked on Portal when using react-portal, but this broke when we switched to using Material-UI's Popper (which uses a Portal internally). Adding a div within the Popper appears to fix selecting items on touch/mobile except for the case of the "Load more items" case. I tried adding a e.stopPropagation() to the ListItem's onClick in the paginated story, but it would still trigger the outer click.

Need to think some more on this one...

[techniq]

See #46, but I just tested removing { suppressRefError: true } and added disablePortal to Popper, but the issue still remains.