Missing Command Palette button on Navigation Focus Mode with Top toolbar

[jeryj]

Description

When on the navigation focus mode and the top-level navigation is selected, the command palette button is missing. We could add useHasBlockToolbar to check if a toolbar will be rendered or not, but it's a slow check that increases the block selection/focus metric by 25%. Ideally, we could solve this with CSS-only, but it would likely require shuffling the DOM around so the block toolbar is a sibling of edit-site-header-edit-mode__center.

The issue is pretty minor overall and if the navigation focus-mode is going away soon(?) then maybe this isn't worth addressing.

Step-by-step reproduction instructions

1. Go to site editor
2. Select Navigation from the sidebar
3. Select a Navigation Menu
4. Turn on Top Toolbar
5. Select the navigation block
6. Arrow up until the top level navigation block is selected
7. Command palette and block tools are both missing

Screenshots, screen recording, code snippet

Screen.Recording.2024-04-30.at.12.54.34.PM.mov

Environment info

No response

Please confirm that you have searched existing issues in the repo.

Yes

Please confirm that you have tested with all plugins deactivated except Gutenberg.

Yes