Fix: Close "Block Styles" section on transformBlockTo e2e test helper.

packages/e2e-test-utils/src/transform-block-to.js

@@ -7,6 +7,14 @@ export async function transformBlockTo( name ) {
 	await page.mouse.move( 200, 300, { steps: 10 } );
 	await page.mouse.move( 250, 350, { steps: 10 } );
 	await page.click( '.block-editor-block-switcher__toggle' );
+	// Close the "Block Styles" section if it is open.
+	// Having the section open may make the transform buttons hidden on the testing resolution.
+	const closeBlockStylesButton = await page.$x(
+		'//div[contains(@class,"block-editor-block-switcher__popover")]//button[contains(text(),"Block Styles")][@aria-expanded="true"]'
+	);
+	if ( closeBlockStylesButton.length > 0 ) {
+		await closeBlockStylesButton[ 0 ].click();
+	}
 	const insertButton = ( await page.$x(
 		`//button//span[contains(text(), '${ name }')]`
 	) )[ 0 ];