Ticket #26497: 26497.diff

src/wp-admin/js/theme.js

@@ -390 +390 @@
 
                 // Bind keyboard events.
                 $('body').on( 'keyup', function( event ) {
+                        if ( ! self.overlay ) {
+                                return;
+                        }
+
                         // Pressing the right arrow key fires a theme:next event
                         if ( event.keyCode === 39 ) {
                                 self.overlay.nextTheme();