Picking uses react synthetic events

[floryst]

This commit will make picking events more predictable, as they now are handled via React's event system rather than the native system.

@FezVrasta here is my implementation, which may be simpler.

[jourdain]

:tada: This PR is included in version 2.0.0-beta.5 :tada:

The release is available on:

• npm package (@beta dist-tag)
• GitHub release

Your semantic-release bot :package::rocket: