Edit button in the Audio block uses invalid buttonProps attribute

[bradyvercher]

Issue Overview

The Edit button in the BlockControls element of the Audio block attempts to set an invalid buttonProps attribute, which throws a warning in the console.

Steps to Reproduce (for bugs)

1. Insert an Audio block
2. Check the console

Possible Solution

This is the current markup:

<Button
	buttonProps={ {
		className: 'components-icon-button components-toolbar__control',
		'aria-label': __( 'Edit audio' ),
	} }
	type="audio"
	onClick={ switchToEditing }
>
	<Dashicon icon="edit" />
</Button>

Those props should probably be flattened to:

<Button
	className="components-icon-button components-toolbar__control"
	aria-label={ __( 'Edit audio' ) }
	type="audio"
	onClick={ switchToEditing }
>
	<Dashicon icon="edit" />
</Button>

Screenshots / Video