ExpandableListItem: Add context menu for contextualActions

Kai Uwe Broulikrequested to merge
work/kbroulik/expandable-ctxmenu into master

We removed the custom context menu a while agon in favor of declarative "contextual actions".

This adds a context menu that provide access to them without expanding the list item and then having to scan for the action.

I hate that I cannot just right-click my network connections to edit them, this fixes that:

Bildschirmfoto_20250906_173229

I especially have trouble finding the configure action in the overwhelming details view ontop of blue background etc. The menu provides quicker access (less mouse travel) and better contrast.

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