Bug Report

• Package version(s): latest
• Browser and OS versions: any

Describe the issue:

The PeoplePicker control doesn't have focus border when TAB focused by keyboard.

Actual behavior:

No focus border

Expected behavior:

A focus border around the box.

If applicable, please provide a codepen repro:

https://fabricreact.azurewebsites.net/fabric-react/master/#/examples/PeoplePicker