Ticket #38563: 38563.patch

wp-admin/js/theme.js

@@ -600 +600 @@
                 $( 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 );
                         }
                 } );