Is your feature request related to a problem? Please describe.
This issue is opened as a follow up for #880

Describe the solution you'd like
#880 (comment) to have focus in the closePopover callback

Kibana Cross Issues
Add any Kibana related issues/feature requests here.

Checklist

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• this request is checked against already exist requests
• every related Kibana issue is listed under Kibana Cross Issues list
• kibana cross issue tag is associated to the issue if any kibana cross issue is present