GH-2216: Disable sidebar links on last page of Tutorial and Customize Setup in the hub

[benstrumeyer]

• Have you followed the guidelines in CONTRIBUTING.md?
• Have you checked to ensure there aren't other open Pull Requests for the same update/change?
• Have you added an explanation of what your changes do?
• Does your submission pass tests?
• Did you lint your code prior to submission?

• Modify the disableRegEx in the render() method of sideNavigationViewContainer.jsx to disable the sidebar links

Ticket: https://ghostery.atlassian.net/browse/GH-2216

[wlycdgr]

LGTM