Editor: Fix broken compute vertex normals button. (#23865)

editor/js/Sidebar.Geometry.Modifiers.js

@@ -1,4 +1,4 @@
-import { UIRow, UIButton } from './libs/ui.js';
+import { UIDiv, UIButton } from './libs/ui.js';
 
 function SidebarGeometryModifiers( editor, object ) {