Edit Comment : Toolbar: Toolbar is missing appropriate role and/or attributes

Issue Summary

The toolbar element for edit comments in the pull request appears and functions like a toolbar but is missing the required ARIA role(s) and/or attribute(s).

Steps to Reproduce

1. Launch the URL
2. Navigate to the comment section on the pull request page.
3. Activate the "Edit" link available on any comment.
4. Navigate into the text input area for the comment and navigate into the toolbar.

Actual Results

In the Edit comment for pull requests, the role is not defined for the interactive toolbar div element. This made it difficult for screen reader users to access the functionality associated with it.

When native HTML elements are used basic information about an element, such as name, role, state and value are exposed to assistive technologies by default. However, for custom components, this information needs to be made available for assistive technologies, so users can interact with the custom components effectively.

Expected Results

Apply the following changes:
• Provide role="toolbar" for the <div> element containing the mentioned element.
• Provide hidden instructions such as "Use this toolbar to edit the comment for pull request". This instruction should be before buttons in the page source.

A working example of a toolbar: https://www.w3.org/TR/wai-aria-practices/examples/toolbar/toolbar.html 

Screenshot

Workaround

Currently, there is no known workaround for this behaviour. A workaround will be added here when available.

Bug Ref: 737179