Theme Installer: Fix displaying of errors.

props SergeyBiryukov.
fixes #27640.

Built from https://develop.svn.wordpress.org/trunk@27958


git-svn-id: http://core.svn.wordpress.org/trunk@27788 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/js/theme.js

@@ -1281,8 +1281,9 @@ themes.view.Installer = themes.view.Appearance.extend({
 		});
 
 		this.listenTo( this.collection, 'query:fail', function() {
+			$( 'body' ).removeClass( 'loading-themes' );
 			$( '.theme-browser' ).find( 'div.error' ).remove();
-			$( '.theme-browser' ).append( '<div class="error"><p>' + l10n.error + '</p></div>' );
+			$( '.theme-browser' ).find( 'div.themes' ).before( '<div class="error"><p>' + l10n.error + '</p></div>' );
 		});
 
 		// Create a new collection with the proper theme data