Ability to set label when creating editable element

[lnmp4000]

In useMultiRootEditor.tsx the editable elements are created with a call to

editable = ui.view.createEditable( rootName, innerRef.current );

This API can actually take 3 parameters:
Parameters:

• editableName : string
  The name for the editable.

• [ editableElement ] : HTMLElement
  DOM element for which the editable should be created.

• [ label ] : string
  The accessible editable label used by assistive technologies.

The above call should be updated so it passes in the label element. This would need to be passed as a property from the code that sets up the editableElements array

	const editableElements = roots.map(
		rootName => (
			<EditorEditable
				key={rootName}
				id={rootName}
				rootName={rootName}
				semaphore={semaphore}
                                label={label} //proposed new property to pass label
			/>
		)
	);

So ideally when creating a root we can specify some additional config (the label)

I setup my root with a call to

editor.addRoot(id, {
                data: getIn(getFieldMeta.current().value, id),
                isUndoable: false,
                config: {  //proposed new property to pass the label 
                     label:'My Label'
               }
            });

If this were extended to allow an optional label to be specified, that would be very useful.