Radius control: the range input is unlabelled

[afercia]

Description

In the Radius control, the slider input (type=range) is unlabelled. All form controls need to be labelled.

Step-by-step reproduction instructions

• edit a block that supports the radius control e.g.: Columns
• make sure the Radius control is enabled in the 'Dimensions
• use the Chrome dev tools to inspect the source of the Radius control that is displayed in the sidebar
• select the radius slider input (type=range)
• observe there's no associated label element or any aria-label / aria-labelledby
• in the Chrome dev tools, go to the Accessibility tab
• observe the accessible 'Name' under the computed properties is empty:

Screenshots, screen recording, code snippet

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Environment info

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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