UX: Submenus doesn't use safety triangle

[SQReder]

https://github.com/user-attachments/assets/315f61b1-d79f-466b-9377-c10a700e891c

From floating-ui docs - https://floating-ui.com/docs/usehover#safepolygon

Article on medium https://medium.com/@nielsmanders/the-context-menu-safety-triangle-411c75065374

Related issue with explanation and examples https://github.com/shoelace-style/shoelace/issues/1550