feat: [FC-0070] Remove backend redirects (use SPA functionality) (#1372)

Introduces the ability to utilize SPA functionality when the relevant waffle flags are enabled for current MFE pages. When any new MFE page is loaded, a request is made to retrieve the waffle flags. This includes both global waffle flags related to MFE Authoring pages, as well as waffle flags specific to the current course.

src/generic/help-sidebar/HelpSidebarLink.jsx

@@ -1,9 +1,21 @@
-import React from 'react';
+import { Link } from 'react-router-dom';
 import PropTypes from 'prop-types';
 import { Hyperlink } from '@openedx/paragon';
 
-const HelpSidebarLink = ({ as, pathToPage, title }) => {
+const HelpSidebarLink = ({
+  as, pathToPage, title, isNewPage,
+}) => {
   const TagElement = as;
+  if (isNewPage) {
+    return (
+      <TagElement className="sidebar-link">
+        <Link to={pathToPage}>
+          {title}
+        </Link>
+      </TagElement>
+    );
+  }
+
   return (
     <TagElement className="sidebar-link">
       <Hyperlink
@@ -18,6 +30,7 @@ const HelpSidebarLink = ({ as, pathToPage, title }) => {
 };
 
 HelpSidebarLink.propTypes = {
+  isNewPage: PropTypes.bool,
   pathToPage: PropTypes.string.isRequired,
   title: PropTypes.string.isRequired,
   as: PropTypes.string,
@@ -25,6 +38,7 @@ HelpSidebarLink.propTypes = {
 
 HelpSidebarLink.defaultProps = {
   as: 'li',
+  isNewPage: true,
 };
 
 export default HelpSidebarLink;