After v0.27.3 update, unable to sort books #1639

Describe the bug
When attempting to sort a book, the sorting links are dead.

Steps To Reproduce
Steps to reproduce the behavior:

1. Go to any Book
2. Click on Sort
3. Scroll to top of page
4. Attempt to click on one of sorting options
5. Nothing happens

Expected behavior
I would expect the sorting links to sort according to how they're labeled.

Screenshots

Your Configuration (please complete the following information):

• Exact BookStack Version (Found in settings): 0.27.3
• PHP Version: 7.2.19
• Hosting Method (Nginx/Apache/Docker): Apache

Additional context
Sorting worked fine before updating to Bookstack v0.27.3