Block Locking: Tabindex lost when lock icon is removed from the block menu

[annezazu]

Description

This was noted as part of the fifteenth call for testing for the FSE Outreach program.

As a concrete example, removing any lock setting via keyboard nav seems to drop the user back into the global context, needing to tab to the location they were previously at. I think that’s likely due to the lock DOM element no longer being present.

cc @Mamaduka

Step-by-step reproduction instructions

1. Lock a block.
2. Using your keyboard, go to unlock the same block that was just locked.
3. Notice that after locking, focus is lost on the item you are locking/unlocking.

Screenshots, screen recording, code snippet

locking.unlocking.mp4

Environment info

• WordPress 6.0.2
• Gutenberg 13.7

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