cc @1Copenut

Focus isn't returned to the triggering button element when closing a context menu.

Steps to reproduce

1. Go to https://elastic.github.io/eui/#/navigation/context-menu
2. Click "click me to load a context menu" button.
3. Tab through the menu, then press ESC to close the menu
4. Verify the body tag has keyboard focus (document.activeElement)

Plain EuiPopover components work fine. As soon as you add an EuiContextMenu to the EuiPopover the focus isn't returned correctly to the trigger button element when closing the context menu.

Related issues

• [FOCUS]: Focus needs to be returned to the spaces icon when the popover is closed kibana#114199
• [FOCUS]: Focus needs to be returned to the account icon when users close the Popover kibana#114194
• [FOCUS]: Focus needs to be returned to the Full screen | Share | Clone | Edit button when the popover is closed kibana#116178