Problem: Fullwidth treeview doesn't load when `treeview_items_per_page_max` is increased

Steps to reproduce the behavior

As per AtoM documentations, for sites with very large hierarchies that wants to set the initial page load value higher than 10,000 records, a system administrator can modify this max value in the configuration file found at config/app.yml. Look for the following line in the file: treeview_items_per_page_max: 10000
Go to Admin > Settings > Treeview, under Full-width, increase the Items per page to match the value updated in config/app.yml
Clear application cache, populate index, and restart PHP-fpm
Go to a description
Note that the treeview will not load, irregardless of the number of items in the treeview

Treeview should load

AtoM 2.10

Problem: Fullwidth treeview doesn't load when treeview_items_per_page_max is increased