[ui5-popup]: First focusable element is not located correctly

[GerganaKremenska]

Bug Description

In Popup.ts - getFisrtFocusableElement is not optimized to search in depth but searches sibling first.

Affected Component

ui5-popover, ui5-responsive-popover, ui5-dialog

Expected Behaviour

Focus should go on "Item 3", instead it focuses the first focusable element which is on a higher node level.

Isolated Example

https://js-wensajc5.stackblitz.io/

Steps to Reproduce

1. open https://js-wensajc5.stackblitz.io/
2. Click the menu button
3. Select "Item 3"
4. Click menu button again

Log Output, Stack Trace or Screenshots

No response

Priority

High

UI5 Web Components Version

2.7.3

Browser

Chrome

Operating System

No response

Additional Context

No response

Organization

No response

Declaration

• I’m not disclosing any internal or sensitive information.