Work item - mobile ancestors widget

What does this MR do and why?

This MR improves displaying Work item ancestors widget on mobile by moving the top ancestor to the drodpown.

MR acceptance checklist

Please evaluate this MR against the MR acceptance checklist. It helps you analyze changes to reduce risks in quality, performance, reliability, security, and maintainability.

Screenshots or screen recordings

Before	After

How to set up and validate locally

Numbered steps to set up and validate the change are strongly suggested.

Related to #433020 (closed)