Require base styles for install and login stylesheets.

Author: peterwilsoncc

src/wp-includes/script-loader.php

@@ -1633,8 +1633,8 @@ function wp_default_styles( $styles ) {
 
 	$styles->add( 'wp-admin', false, array( 'dashicons', 'common', 'forms', 'admin-menu', 'dashboard', 'list-tables', 'edit', 'revisions', 'media', 'themes', 'about', 'nav-menus', 'widgets', 'site-icon', 'l10n', 'wp-base-styles' ) );
 
-	$styles->add( 'login', "/wp-admin/css/login$suffix.css", array( 'dashicons', 'buttons', 'forms', 'l10n' ) );
-	$styles->add( 'install', "/wp-admin/css/install$suffix.css", array( 'dashicons', 'buttons', 'forms', 'l10n' ) );
+	$styles->add( 'login', "/wp-admin/css/login$suffix.css", array( 'dashicons', 'buttons', 'forms', 'l10n', 'wp-base-styles' ) );
+	$styles->add( 'install', "/wp-admin/css/install$suffix.css", array( 'dashicons', 'buttons', 'forms', 'l10n', 'wp-base-styles' ) );
 	$styles->add( 'wp-color-picker', "/wp-admin/css/color-picker$suffix.css" );
 	$styles->add( 'customize-controls', "/wp-admin/css/customize-controls$suffix.css", array( 'wp-admin', 'colors', 'imgareaselect' ) );
 	$styles->add( 'customize-widgets', "/wp-admin/css/customize-widgets$suffix.css", array( 'wp-admin', 'colors' ) );