Bug Report

• Package version(s): 5.39.0

Priorities and help requested (not applicable if asking question):

Are you willing to submit a PR to fix? Yes

Requested priority: Normal

Products/sites affected: Office Online

Describe the issue:

Currently there's no way to set aria-label for the OverflowSet outside of passing the properties through on the FocusZoneProps prop, which isn't the best. We should consider allowing any html attributes to make a more broad solution to this problem