Index: wp-admin/js/theme.js
===================================================================
--- wp-admin/js/theme.js	(revision 38949)
+++ wp-admin/js/theme.js	(working copy)
@@ -600,6 +600,7 @@
 		$( document ).on( 'wp-theme-install-success', function( event, response ) {
 			if ( _this.model.get( 'id' ) === response.slug ) {
 				_this.model.set( { 'installed': true } );
+				_wpThemeSettings.installedThemes.push( response.slug );
 			}
 		} );