Move block Menu selection and "Start Empty" actions to inspector controls

[getdave]

What problem does this address?

When displayed on the editor canvas, the goal should be that the Navigation block should - as far as is possible - remain 1:1 with what is displayed on the front of the site.

An effort is underway to improve the fallback states for the block so that they mirror what is displayed on the front of the site and require no user interaction to "just work".

What is your proposed solution?

Therefore to reduce UI clutter and noise we should move secondary block actions for Select Menu and Start empty to the inspector controls.

This will allow the block fallback states to remain 1:1 with the front of the site whilst also still affording the ability to take actions to force the block to a specific state if required.

Note that this effort is important because when displaying a list of Pages as a fallback, it would be difficult to show the block actions alongside the Page List block in the canvas.

[getdave]

@javierarce Would it be possible to look into the design of this?

[javierarce]

A bit of a tangential question related to #42563 and this issue: what would happen if a user with no pages and no other menus adds a navigation block? Should we render an empty navigation with an inserter or do we fall back to a placeholder state?

[javierarce]

Here are a couple of ideas:

The first one uses a custom dropdown that includes the list of menus and an option to create an empty new one.

The second idea is to present a regular dropdown and show the option to create menus directly on the sidebar along with the link to manage the menus.

[getdave]

Thank you for this design @javierarce 🙇‍♂️ 🙇‍♂️ 🙇‍♂️

The first one uses a custom dropdown that includes the list of menus and an option to create an empty new one.

This has a least visual "noise". The create empty action is likely a 20% use case and so probably doesn't need to be visible at all times.

[draganescu]

I am picking up this one. I erroneously based #42987 on different designs but now I'm on the right track :D

[scruffian]

This was closed by #42987