Reorganized folders to try to clean up the root folder a bit

public/assets/vendor/popper.js/packages/test-utils/utils/makeConnectedScrollElement.js

@@ -0,0 +1,10 @@
+import makeConnectedElement from './makeConnectedElement';
+
+/**
+ * Create a scrollable element that's connected to the DOM.
+ */
+export default function makeConnectedScrollElement() {
+  const elem = makeConnectedElement();
+  elem.style.overflow = 'scroll';
+  return elem;
+}