Themes: Prevent the Themes search field default action after [40572].

Props boonebgorges.
Fixes #41803.

Built from https://develop.svn.wordpress.org/trunk@41337


git-svn-id: http://core.svn.wordpress.org/trunk@41170 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/js/theme.js

@@ -105,7 +105,10 @@ themes.view.Appearance = wp.Backbone.View.extend({
 		view.render();
 		this.searchContainer
 			.append( $.parseHTML( '<label class="screen-reader-text" for="wp-filter-search-input">' + l10n.search + '</label>' ) )
-			.append( view.el );
+			.append( view.el )
+			.on( 'submit', function( event ) {
+				event.preventDefault();
+			});
 	},
 
 	// Checks when the user gets close to the bottom

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.9-alpha-41335';
+$wp_version = '4.9-alpha-41337';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.