[Fix] UI 0047403: HTML validator: Use role='group' for tree-containing slates

[fhelfer]

Problem: The UI Component documentation tool window triggered HTML validator errors: role="tree" and role="treeitem" are not allowed inside role="menu" (only menuitem, menuitemcheckbox, etc. are valid).

Solution:

• Add role="group" as an allowed ARIA role for Slates (valid container for tree content)
• Switch UI Component documentation from Tool to TreeTool so it uses the TreeToolItemRenderer
• TreeToolItemRenderer sets role="group" on its slate
• Main Bar Renderer no longer overwrites an existing ARIA role on slates

https://mantis.ilias.de/view.php?id=47403

[oliversamoila]

Hello @thibsy,
Could you please take this over directly, check it and, ideally, integrate it into Release 11 and Trunk. You will also need to decide whether Release 10 is applicable.

Best regards,
Oliver

[chfsx]

The changes in GS are fine, thanks!

[thibsy]

Hi @fhelfer,

Thx a lot for the Bugfix.

Please help me answer the following questions:

• Isn't this issue addressed by removing the aria-role entirely from MainControls\Slate\Legacy, as proposed in #11014?

Kind regards,
@thibsy (as UI coordinator)

[fhelfer]

@thibsy, you are right i must have missed that i already provided a PR for the same issue.
I think this solution might be the better approach to solving this, rather that just removing the aia-role completely

[thibsy]

@fhelfer no I think we should stick with #11014, because as mentioned there, we cannot safely tell what role is actually suitable. And, since we do not want to push design decisions like that onto our consumers in general, I think its best to just leave it out. We should rather tackle the underlying issue, that we do not yet have semantic (enough) components for use-cases like this.

I leave this PR open until we have verified that the other PR does indeed solve both issues.

[thibsy]

@oliversamoila confirmed, thx! I therefore close this.