Hide page list edit button if no pages available (WordPress#46331)

* hides page list edit button if no pages avaulable

* Don't output BlockControls if there are no pages

Co-authored-by: Andrei Draganescu <github@andreidraganescu.info>
Co-authored-by: Ben Dwyer <ben@scruffian.com>

packages/block-library/src/page-list/edit.js

@@ -193,7 +193,7 @@ export default function PageListEdit( {
 					/>
 				</PanelBody>
 			</InspectorControls>
-			{ allowConvertToLinks && (
+			{ allowConvertToLinks && totalPages > 0 && (
 				<BlockControls group="other">
 					<ToolbarButton title={ __( 'Edit' ) } onClick={ openModal }>
 						{ __( 'Edit' ) }