[FOCUS]: Focus needs to be returned to the Full screen | Share | Clone | Edit button when the popover is closed

[1Copenut]

Steps to reproduce

1. Open a Kibana instance
2. Press the TAB key until the Full screen | Share | Clone | Edit button is highlighted. Press ENTER.
3. Tab through the menu, then press ESC to close the menu
4. Verify the body tag has keyboard focus

Related Issue

• https://github.com/elastic/kibana/issues/114194
• https://github.com/elastic/kibana/issues/114199

Actual Result

• Focus is returned to the body tag when the spaces Popover is closed

Expected Result

• Focus should be returned to the pressed button when the Popover is closed

Kibana Version: v8.0.0, v7.13.0

OS: MacOS Big Sur

Browser: Chrome latest

Relevant WCAG Criteria: Understanding Success Criterion 2.4.3: Focus Order - Level A

[elasticmachine]

Pinging @elastic/kibana-accessibility (Project:Accessibility)

[elasticmachine]

Pinging @elastic/kibana-core (Team:Core)

[elasticmachine]

Pinging @elastic/kibana-presentation (Team:Presentation)

[pgayvallet]

CC @elastic/kibana-presentation: even if these actions are living inside the chrome header, they are registered via the setHeaderActionMenu API of an app's mount function. Only the action's owner can add the proper logic to set the focus back to the button element when the associated menu is closed.

[ThomThomson]

Bumping this up to Medium and adding it to our a11y backlog.