Vaadin25: Overflow has wrong style

[paodb]

Describe the bug

Expected behavior

Minimal reproducible example

Overflow example at https://addonsv25-staging.flowingcode.com/day-of-week-selector/demo

Add-on Version

1.2.1-SNAPSHOT

Vaadin Version

25.0.0-beta7

Additional information

No response

[javier-godoy]

In Vaadin 24: the overflow buttons are in the light DOM (contained in vaadin-context-menu-overlay)
In Vaadin 25: the overflow buttons are in the shadow DOM of fc-days-of-week-selector