Themes: Fix missing search field in the Theme Install screen after [40572].

Props desrosj, cristianozanca for reporting.
Fixes #34881.


git-svn-id: https://develop.svn.wordpress.org/trunk@40586 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-admin/css/themes.css

@@ -20,7 +20,7 @@
 }
 
 /* Search form */
-.themes-php .wp-filter-search-form {
+.themes-php .search-form {
 	display: inline;
 }
 

src/wp-admin/js/theme.js

@@ -83,7 +83,7 @@ themes.view.Appearance = wp.Backbone.View.extend({
 	},
 
 	// Defines search element container
-	searchContainer: $( '.wp-filter-search-form' ),
+	searchContainer: $( '.search-form' ),
 
 	// Search input and view
 	// for current theme collection

src/wp-admin/theme-install.php

@@ -164,7 +164,7 @@ include(ABSPATH . 'wp-admin/admin-header.php');
 
 		<button type="button" class="button drawer-toggle" aria-expanded="false"><?php _e( 'Feature Filter' ); ?></button>
 
-		<div class="search-form"></div>
+		<form class="search-form"></form>
 
 		<div class="favorites-form">
 			<?php

src/wp-admin/themes.php

@@ -160,7 +160,7 @@ require_once( ABSPATH . 'wp-admin/admin-header.php' );
 		<a href="<?php echo admin_url( 'theme-install.php' ); ?>" class="hide-if-no-js page-title-action"><?php echo esc_html_x( 'Add New', 'Add new theme' ); ?></a>
 	<?php endif; ?>
 
-	<form class="wp-filter-search-form"></form>
+	<form class="search-form"></form>
 
 	<hr class="wp-header-end">
 <?php