Better communicate which Menu is being used by the Navigation block

[getdave]

Circling back to this Issue which has not moved.

My feeling is we need to communicate which Menu is being used on which block. Currently to do that you have to:

• Click on the Navigation block
• Open the block sidebar
• Click on the List View tab
• Click on the 3 dots menu
• See the currently selected Menu.

That's not helpful to users.

I believe we should consider addressing this in small steps:

Firstly, surface the menu _name_ next to the word `Menu` in the Navigation block's `List View` tab


Secondly, consider surfacing the menu name in the List View next to the Navigation block.


There may also be additional affordances we can offer but I believe this Issue should be renamed and refocused on communicating the name of the associated Menu without overloading the UI for less experienced users who may not need to know about the sync'd nature of Navigation Menus.

Originally posted by @getdave in #49158