Tools panel: avoid unnecessary mismatch between visible label and accessible name

[afercia]

Description

Similar to https://github.com/WordPress/gutenberg/issues/65112 and https://github.com/WordPress/gutenberg/issues/65235

In the Tools panel, the aria-label attributes for the elements that are shown / hidden and reset mismatch the visible text. As such, this is a mismatch between vissual label and actual accessible bane that is a barrier for some users.

This kind of mismatch should always be avoided. For example:

• The visibele text is H2.
• The actual accessible name is either Show H2 or Hide and reset H2.
• This is:
  • Confusing for sighted screen reader users.
  • An actual barrier for speech recognition / voice control users.

Worth also reminding the label of a control i.e. its accessible name isn not the right place to communicate states or values.

https://github.com/WordPress/gutenberg/blob/b1c96760fee50cc0c885c5a030525cbfad83b0a9/packages/components/src/tools-panel/tools-panel-header/component.tsx#L101-L111

Step-by-step reproduction instructions

• Go, for example, to Site Editor > Styles > Colors > Elements > Elements options (the ellipsis icon button)
• Open the Elements options popover.
• Observe the toggleable items in the menu have a visible text like H1, H2, etc.
• Observe the aria-label of these items is either Show H1, Show H2, etc. or Hide and reset H1, Hide and reset H2, etc. depending on the state.

Screenshots, screen recording, code snippet

No response

Environment info

No response

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

• [X] Yes

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

• [X] Yes

[afercia]

I would argue that also from a visual design perspective, the entire tools panel purpose and functionality isn't clear.

• The ellipsis button toggle that opens the popover is labeled Elements options.
• The Menu within the Popover has a visible title Elements.
• However, its actual aria-label is aria-label="Elements options" so this is one more mismatch between visible label and accessible name.
• The first Group within the menu is labeled Elements via an aria-labelledby="components-menu-group-label-1" which just adds more confusion.
• There's no visible text or any label or description that actually explains this menu is meant to toggle the visibility of the elements available in the main panel.

As a user, I'd only understand what this menu is about only after I try to use it and _only if I'm able to notice that new items appear or are removed from the main panel. To me, any UI should be self-explanatory instead of forcing users to 'try and discover' to learn how it works.