E2E Tests: Fix LOHP tests (#97338)

Scrolling list of themes needs to be hovered on before click, otherwise
not considered stable by Playwright.

test/e2e/specs/onboarding/signup__with-theme-LOHP.ts

@@ -85,6 +85,8 @@ describe( 'Lifecyle: Logged Out Home Page, signup, onboard, launch and cancel su
 			const pageMatch = new URL( themeButtonUrl.href ).search.match( 'theme=([a-z]*)?&' );
 			themeSlug = pageMatch?.[ 1 ] || null;
 
+			// Hover, otherwise the element isn't considered stable, and is out of the viewport.
+			await themeCard.hover();
 			await themeCard.getByText( 'Start with this theme' ).click();
 		} );