Add a React-compatible redirect after login utility

[holmbergius]

Feature description and context

URLs in Wildbook are secured for limited access. Where a user seeks to open a secured URL before login, they should be directed to the React-based login page and then redirected back to the original URL after successful authentication.

Feature sign-off requirements

• Desired URL is intercepted and preserved when unauthenticated user is redirected to login
• After successful login, user is forwarded to their original URL

Design

There are no visual design elements.